ADULTS
• Age 18-90
• Any participant undergoing sleep endoscopy as part of standard clinical care would be eligible. This entails physician concern for sleep-disordered breathing and corresponding questionnaire and/or polysomnogram results supporting a diagnosis of obstructive sleep apnea.
• Participants without apnea are eligible, provided they are undergoing tonsillectomy or bronchoscopy for either chronic tonsillitis or airway assessment without concern for history of sleep apnea.
• Women with childbearing potential will not be excluded, as the proposed experiment would have no potential ramifications on childbearing potential. CHILDREN
• Age 5-17
• Any patients undergoing sleep endoscopy as part of standard clinical care would be eligible.
• Participants undergoing either tonsillectomy for chronic tonsillitis or bronchoscopy for airway assessment.
• Women with childbearing potential will not be excluded, as the proposed experiment would have no potential ramifications on childbearing potential.
• Participant desire to avoid added anesthesia time.
• Inability to safely tolerate the added anesthesia time (about 5-10 minutes) for the experiment (as judged by either otolaryngologist or anesthesiologist).
• Pregnant women
• Vulnerable groups (i.e., prisoners, individuals lacking consent capacity, individuals unable to read the consent form).

1. Adult or pediatric patient suffering from CMV reactivation/infections following HSCT or due to other immunocompromised states (e.g.; primary immunodeficiency, cytotoxic therapy).
• CMV reactivation/viremia defined as positive (>500 copies/ml) CMV qPCR and/or
• Presence of symptoms secondary to CMV infection or evidence of invasive CMV infection (e.g. pneumonitis, colitis) AND
• Patients must have ONE OF THE FOLLOWING CRITERIA:
• Absence of an improvement of viral load after ≥ 14 days of antiviral therapy with ganciclovir, valganciclovir or foscarnet (decrease by at least 1 log, i.e. 10-fold), or
• New, persistent and/or worsening CMV-related symptoms, signs and/or markers of end organ compromise while on antiviral therapy with ganciclovir, valganciclovir or foscarnet, or
• Have contraindications or experience adverse effects of antiviral therapy with ganciclovir, valganciclovir or foscarnet, or
• Known resistance to ganciclovir and/or foscarnet based on molecular testing. 2. Recipients of an allogeneic HSCT must be 28 days after stem cell infusion at the time of T-cell transfer. 3. Written informed consent given by patient or legal representative. 4. Minimum patient age 1 month. 5. Minimum weight 7 lbs. 6. Female patients of childbearing age with negative pregnancy tests. 7. Patient Karnofsky/Lansky Performance Status >30%. 8. Donor eligible based on FACT infectious screening requirements. 1. Patient with acute GVHD > grade 2 or active moderate or severe chronic GVHD at time of T-cell transfer 2. Patient receiving steroids (>1.0 mg/kg body weight (BW) prednisone equivalent) at the time of T-cell transfer 3. Patient received allogeneic HSCT less than 28 days prior to T-cell transfer 4. Patient treated with donor lymphocyte infusion (DLI) within 28 days prior to T-cell transfer 5. Patient treated with Thymoglobulin (ATG), Alemtuzumab or T-cell immunosuppressive monoclonal antibodies within 28 days. 6. Patient with organ dysfunction or failure as determined by Karnofsky (patients >16 years) or Lansky (patients ≤16 years) score ≤30% (Appendix 5) 7. Patients with CMV retinitis 8. Concomitant enrollment in another clinical trial with endpoints interfering with this study 9. Any medical condition which could compromise participation in the study according to the investigator's assessment 10. Known HIV infection 11. Female patient who is pregnant or breast-feeding, or adult of reproductive potential not willing to use an effective method of birth control during study treatment. Note: Women of childbearing potential must have a negative serum pregnancy test at study entry. 12. Patients unwilling or unable to comply with the protocol or unable to give informed consent. Donor Eligibility: The original donor will be the first choice as source of T cells. If the original donor is not available for donation (such as NMDP donor, cord blood unit, or related donor not available) of peripheral mononuclear cells or does not meet all donor eligibility criteria (including donor selection criteria based on University of Wisconsin
•Madison Standard Operating Procedures for the selection of allogeneic donors), alternative related donors will be selected, with preference for those who have full HLA matching in 6/6 loci over those with partial HLA matching (≥ 3/6 HLA loci). 1. All donors must be ≥ 18 years old, available, CMV IgG positive, eligible and capable of undergoing a single standard 2 blood volume leukapheresis. If original HSCT donor is not available, CMV IgG negative or ineligible, a CMV IgG positive fully matched or haploidentical family donor will be used. 2. Related donors must be at least partially HLA compatible, matching with recipient in at least 3/6 HLA loci (HLA-A, HLA-B and HLA-DRB1 will be considered for this). 3. Donors must be CMV IgG seropositive. 4. Donors must show CMV T-cell activation after incubation with MACS GMP PepTivator Peptide Pools of CMV pp65 before undergoing leukapheresis. 5. Donor must meet the criteria for donor selection defined in the Standard Operating Procedures of the University of Wisconsin Hospitals and Clinics Stem Cell Transplant Program and in FACT standards.

1. History of or concurrent asthma or allergic rhinitis (hay fever) in either biologic parent or sibling (at least one shared biological parent) by parental report. The presence of paternal or sibling allergy or asthma will be ascertained by maternal report. 2. Maternal age greater than or equal to 18 years at the time of study enrollment. 1. Maternal HIV infection at time of delivery. 2. Plans for the family to move out of the geographic area during the period of the study. 3. Does not speak English. 4. Current maternal use of progesterone during pregnancy to prevent preterm birth.
• Progesterone use is only an exclusion if currently being taken at time of enrollment for preterm birth. Previous use to prevent preterm birth or use at any time for other indications is allowed. 5. Pregnancy is a result of an embryo donor (egg and sperm donor pregnancies are permitted). 6. Past or current medical problems or findings from physical examination or laboratory testing which, in the opinion of the investigator or designee, may pose additional risks from participation in the study, may interfere with the participant's ability to comply with study requirements or that may impact the quality or interpretation of the data obtained from the study.

1. Participant is < 21 years of age 2. Parent/ Legal Guardian/ Adult Participant can understand the consent process and is willing to provide informed consent/HIPAA: 3. (a) Participant is receiving one or more of the study drugs of interest at the time of enrollment or (b) Participant is NOT receiving one or more of the study drugs of interest but is SARS-COV-2 positive within 60 days prior to enrollment 1. Participant has a known pregnancy Below exclusion criteria apply only to: Participants receiving one or more of the study drugs of interest at the time of enrollment, DOI administration or PK sampling: (Refer to DOI specific appendices for details on enrollment cohort specifications and additional eligibility criteria) 2. Has had intermittent dialysis within previous 24 hours 3. Has had a kidney transplant within previous 30 days 4. Has had a liver transplant within previous 1 year 5. Has had a stem cell transplant within previous 1 year 6. Has had therapeutic hypothermia within previous 24 hours 7. Has had plasmapheresis within the previous 24 hours 8. Has a Ventricular Assist Device 9. Has any condition which would make the participant, in the opinion of the investigator, unsuitable for the study

1. Written informed consent (and assent when applicable) obtained from subject or subject's legal representative 2. Enrolled in the CFFPR 3. Male or female ≥ 4 months of age on day of study visit 4. Diagnosis of CF. 5. Current treatment with a prescribed commercially approved CFTR modulator for at least 90 days prior to enrollment 6. Able to perform the testing and procedures required for this study, as judged by the investigator Additional Inclusion Criteria for CHEC-PKPD Sub-Study: 1. Male or female ≥ 6 years of age on day of study visit. 2. Current treatment with elexacaftor/tezacaftor/ivacaftor for at least 90 days prior to enrollment. 3. Last dose of elexacaftor/tezacaftor/ivacaftor taken at least 24hours and last dose of ivacaftor taken at least 12 hours prior to trough blood draw on day of visit. 1. Presence of a condition or abnormality that, in the opinion of the Investigator, would compromise the safety of the patient or the quality of the data 2. Currently enrolled in an investigational trial (including open-label follow-on studies and Early Access Programs (EAP) of an agent expected to have an impact on sweat chloride (refer to current list provided on study website)

1. Infants with SCID, either typical or leaky or Omenn syndrome. 1. Typical SCID is defined as either of the following
• Absence or very low number of T cells (CD3+ T cells <300/microliter AND no or very low T cell function (<10% of lower limit of normal) as measured by response to phytohemagglutinin OR
• Presence of maternally derived T cells 2. Leaky SCID is defined as the following • Absence of maternally derived T cells • AND either one or both of the following (i, ii): i) <50% of lower limit of normal T cell function as measured by response to PHA OR <30% of lower limit of normal T cell function as measured by response to CD3 ii) Absent or <10% of lower limit of normal proliferative responses to candida and tetanus toxoid antigens (must document post vaccination or exposure for this criterion to apply) • AND at least two of the following (i through iii): i) CD3 T cells < 1500/microliter ii) >80% of CD3+ or CD4+ T cells are CD45RO+ AND/OR >80% of CD3+ or CD4+ T cells are CD62L negative AND/OR >50% of CD3+ or CD4+ T cells express HLA-DR (at < 4 years of age) AND/OR are oligoclonal T iii) Low TRECs and/or the percentage of CD4+/45RA+/CD31+ or CD4+/45RA+/CD62L+ cells is below the lower level of normal. 3. Omenn syndrome • Generalized skin rash
• Maternal lymphocytes tested for and not detected.
• >80% of CD3+ or CD4+ T cells are CD45RO+ AND/OR >80% of CD3+ or CD4+ T cells are CD62L negative AND/OR >50% of CD3+ or CD4+ T cells express HLA-DR (<2 years of age)
• Absent or low (up to 30% lower limit of normal (LLN)) T cell proliferation to antigens (Candida, tetanus) to which the patient has been exposed IF: Proliferation to antigen was not performed, but at least 4 of the following 8 supportive criteria, at least one of which must be among those marked with an asterisk (*) below are present, the patient is eligible as Omenn Syndrome. 1. Hepatomegaly 2. Splenomegaly 3. Lymphadenopathy 4. Elevated IgE 5. Elevated absolute eosinophil count 6. *Oligoclonal T cells measured by CDR3 length or flow cytometry (upload report) 7. *Proliferation to PHA is reduced to < 50% of lower limit of normal (LLN) or SI < 30 8. *Low TRECs and/or percentage of CD4+/RA+ CD31+ or CD4+/RA+ CD62L+ cells below the lower level of normal 2. Documented mutation in one of the following SCID-related genes a. Cytokine receptor defects (IL2RG, JAK3) b. T cell receptor rearrangement defects (RAG1, RAG2) 3. No available genotypically matched related donor (sibling) 4. Availability of a suitable donor and graft source 1. Haploidentical related mobilized peripheral blood cells 2. 9/10 or 10/10 allele matched (HLA-A, -B, -C, -DRB1, -DQB1) volunteer unrelated donor mobilized peripheral blood cells 5. Age 0 to 2 years at enrollment Note: to ensure appropriate hepatic metabolism, age at time of busulfan start: For IL2RG/JAK3: 8 weeks For RAG1/RAG2: 12 weeks 6. Adequate organ function defined as: 1. Cardiac: Left ventricular ejection fraction (LVEF) at rest ≥ 40% or, shortening fraction (SF) ≥ 26% by echocardiogram. 2. Hepatic: Total bilirubin < 3.0 x the upper limit of normal (ULN) for age (patients who have been diagnosed with Gilbert's Disease are allowed to exceed this limit) and AST and ALT < 5.0 x ULN for age. 3. Renal: GFR estimated by the updated Schwartz formula ≥ 90 mL/min/1.73 m2. If the estimated GFR is < 90 mL/min/1.73 m2, then renal function must be measured by 24-hour creatinine clearance or nuclear GFR, and must be > 50 mL/min/1.73 m2. 4. Pulmonary No need for supplemental oxygen and O2 saturation > 92% on room air at sea level (with lower levels allowed at higher elevations per established center standard of care). 1. Presence of any serious life-threatening or opportunistic infection at time of enrollment and prior to the initiation of the preparative regimen. Serious infections as defined below that occur after enrollment must be reported immediately to the Study Coordinating Center, and enrollment will be put on hold until the infection resolves. Ideally enrolled subjects will not have had any infection. If patients have experienced infections, these must have resolved by the following definitions: a. Bacterial i. Positive culture from a sterile site (e.g. blood, CSF, etc.): Repeat culture(s) from same site must be negative and patient has completed appropriate course of antibacterial therapy (typically at least 10 days). ii. Tissue-based clinical infection (e.g. cellulitis): Complete resolution of clinical signs (e.g. erythema, tenderness, etc.) and patient has completed appropriate course of antibacterial therapy (typically at least 10 days). iii. Pneumonia, organism not identified by bronchoalveolar lavage: Complete resolution of clinical signs (e.g. tachypnea, oxygen requirement, etc.) and patient has completed appropriate course of antibacterial therapy (typically at least 10 days). If possible, radiographic resolution should also be demonstrated. b. Fungal i. Positive culture from a sterile site (e.g. blood, CSF, etc.): Repeat culture(s) from same site is negative and patient has completed appropriate course of antifungal therapy (typically at least 14 days). The patient may be continued on antifungal prophylaxis following completion of the treatment course. c. Pneumocystis i. Complete resolution of clinical signs (e.g. tachypnea, oxygen requirement, etc.) and patient has completed appropriate course of therapy (typically at least 21 days). If possible, radiographic resolution should also be demonstrated. The patient may be continued on prophylaxis following completion of the treatment course. d. Viral i. Viral PCRs from previously documented sites (blood, nasopharynx, CSF) must be re-tested and are negative. ii. If re-sampling a site is not clinically feasible (i.e. BAL fluid): Complete resolution of clinical signs (e.g. tachypnea, oxygen requirement, etc.). If possible, radiographic resolution should also be demonstrated. 2. Patients with HIV or HTLV I/II infection will be excluded.

• Patient must have enrolled onto APEC1621SC and must have been given a treatment assignment to Molecular Analysis for Therapy Choice (MATCH) to APEC1621F based on the presence of an actionable mutation
• Patients must be >= than 12 months and =< 21 years of age at the time of study enrollment.
• Patients must have a body surface area >= 0.5 m^2 at enrollment
• Patients must have radiographically measurable disease at the time of study enrollment. Patients with neuroblastoma who do not have measurable disease but have iobenguane (MIBG) positive (+) evaluable disease are eligible; measurable disease in patients with CNS involvement is defined as any lesion that is at minimum 10 mm in one dimension on a standard MRI or CT
• Note: The following do not qualify as measurable disease:
• Malignant fluid collections (e.g., ascites, pleural effusions)
• Bone marrow infiltration except that detected by MIBG scan for neuroblastoma
• Lesions only detected by nuclear medicine studies (e.g., bone, gallium or positron emission tomography [PET] scans) except as noted for neuroblastoma
• Elevated tumor markers in plasma or cerebrospinal fluid (CSF)
• Previously radiated lesions that have not demonstrated clear progression post radiation
• Leptomeningeal lesions that do not meet the measurement requirements for Response Evaluation Criteria in Solid Tumors (RECIST) 1.1
• Karnofsky >= 50% for patients > 16 years of age and Lansky >= 50 for patients =< 16 years of age
• Note: Neurologic deficits in patients with CNS tumors must have been relatively stable for at least 7 days prior to study enrollment; patients who are unable to walk because of paralysis, but who are up in a wheelchair, will be considered ambulatory for the purpose of assessing the performance score
• Patients must have fully recovered from the acute toxic effects of all prior anti-cancer therapy and must meet the following minimum duration from prior anti-cancer directed therapy prior to enrollment; if after the required timeframe, the numerical eligibility criteria are met, e.g. blood count criteria, the patient is considered to have recovered adequately
• Cytotoxic chemotherapy or other anti-cancer agents known to be myelosuppressive: >= 21 days after the last dose of cytotoxic or myelosuppressive chemotherapy (42 days if prior nitrosourea)
• Anti-cancer agents not known to be myelosuppressive (e.g. not associated with reduced platelet or absolute neutrophil counts [ANC] counts): >= 7 days after the last dose of agent
• Antibodies: >= 21 days must have elapsed from infusion of last dose of antibody, and toxicity related to prior antibody therapy must be recovered to grade =< 1
• Corticosteroids: if used to modify immune adverse events related to prior therapy, >= 14 days must have elapsed since last dose of corticosteroid
• Hematopoietic growth factors: >= 14 days after the last dose of a long-acting growth factor (e.g. pegfilgrastim) or 7 days for short-acting growth factor; for growth factors that have known adverse events occurring beyond 7 days after administration, this period must be extended beyond the time during which adverse events are known to occur; the duration of this interval must be discussed with the study chair and the study-assigned research coordinator
• Interleukins, interferons and cytokines (other than hematopoietic growth factors): >= 21 days after the completion of interleukins, interferon or cytokines (other than hematopoietic growth factors)
• Stem cell Infusions (with or without total body irradiation [TBI]):
• Allogeneic (non-autologous) bone marrow or stem cell transplant, or any stem cell infusion including donor lymphocyte infusion (DLI) or boost infusion: >= 84 days after infusion and no evidence of graft versus host disease (GVHD)
• Autologous stem cell infusion including boost infusion: >= 42 days
• Cellular therapy: >= 42 days after the completion of any type of cellular therapy (e.g. modified T cells, natural killer [NK] cells, dendritic cells, etc.)
• Radiation therapy (XRT)/external beam irradiation including protons: >= 14 days after local XRT; >= 150 days after TBI, craniospinal XRT or if radiation to >= 50% of the pelvis; >= 42 days if other substantial none marrow (BM) radiation
• Note: Radiation may not be delivered to "measurable disease" tumor site(s) being used to follow response to subprotocol treatment
• Radiopharmaceutical therapy (e.g., radiolabeled antibody, 131I-MIBG): >= 42 days after systemically administered radiopharmaceutical therapy
• Patients must not have received prior exposure to ensartinib; prior treatment with other ALK inhibitors is permitted given that at least 5 half-lives or 21 days have elapsed since therapy discontinuation, whichever is greater
• For patients with solid tumors without known bone marrow involvement:
• Peripheral absolute neutrophil count (ANC) >= 1000/mm^3 (within 7 days prior to enrollment)
• Platelet count >= 100,000/mm^3 (transfusion independent, defined as not receiving platelet transfusions for at least 7 days prior to enrollment) (within 7 days prior to enrollment)
• Patients with known bone marrow metastatic disease will be eligible for study provided they meet the blood counts (may receive transfusions provided they are not known to be refractory to red cell or platelet transfusions); these patients will not be evaluable for hematologic toxicity
• Creatinine clearance or radioisotope glomerular filtration rate (GFR) >= 70 ml/min/1.73 m^2 (within 7 days prior to enrollment) or a serum creatinine based on age/gender as follows (within 7 days prior to enrollment):
• Age 1 to < 2 years: maximum serum creatinine 0.6 mg/dL for male and 0.6 mg/dL for female
• Age 2 to < 6 years: maximum serum creatinine 0.8 mg/dL for male and 0.8 mg/dL for female
• Age 6 to < 10 years: maximum serum creatinine 1 mg/dL for male and 1 mg/dL for female
• Age 10 to < 13 years: maximum serum creatinine 1.2 mg/dL for male and 1.2 mg/dL for female
• Age 13 to < 16 years: maximum serum creatinine 1.5 mg/dL for male and 1.4 mg/dL for female
• Age >= 16 years: maximum serum creatinine 1.7 mg/dL for male and 1.4 mg/dL for female
• Bilirubin (sum of conjugated + unconjugated) =< 1.5 x upper limit of normal (ULN) for age (within 7 days prior to enrollment)
• Serum glutamic pyruvic transaminase (SGPT) (alanine aminotransferase [ALT]) =< 135 U/L (within 7 days prior to enrollment) (for the purpose of this study, the ULN for SGPT is 45 U/L)
• Serum albumin >= 2 g/dL (within 7 days prior to enrollment)
• Patients must be able to swallow intact capsules
• All patients and/or their parents or legally authorized representatives must sign a written informed consent; assent, when appropriate, will be obtained according to institutional guidelines
• Pregnant or breast-feeding women will not be entered on this study because there is currently no available information regarding human fetal or teratogenic toxicities; pregnancy tests must be obtained in girls who are post-menarchal; males or females of reproductive potential may not participate unless they have agreed to use an effective contraceptive method for the duration of study treatment and for one week after the last dose of ensartinib
• Concomitant medications
• Corticosteroids: patients receiving corticosteroids who have not been on a stable or decreasing dose of corticosteroid for at least 7 days prior to enrollment are not eligible; if used to modify immune adverse events related to prior therapy, >= 14 days must have elapsed since last dose of corticosteroid
• Investigational drugs: patients who are currently receiving another investigational drug are not eligible
• Anti-cancer agents: patients who are currently receiving other anti-cancer agents are not eligible
• Anti-GVHD agents post-transplant: patients who are receiving cyclosporine, tacrolimus or other agents to prevent graft-versus-host disease post bone marrow transplant are not eligible for this trial
• CYP3A4 agents: patients who are currently receiving drugs that are strong inducers or strong inhibitors of CYP3A4 are not eligible; strong inducers or inhibitors of CYP3A4 should be avoided from 14 days prior to enrollment to the end of the study
• Note: CYP3A4 inducing anti-epileptic drugs and dexamethasone for CNS tumors or metastases, on a stable dose, are allowed
• Patients who have an uncontrolled infection are not eligible
• Patients who have received a prior solid organ transplantation are not eligible
• Patients who in the opinion of the investigator may not be able to comply with the safety monitoring requirements of the study are not eligible

• ELIGIBILITY CRITERIA FOR ENROLLMENT ONTO APEC1621SC: Patients must be >= 12 months and =< 21 years of age at the time of study enrollment
• ELIGIBILITY CRITERIA FOR ENROLLMENT ONTO APEC1621SC: Patients with recurrent or refractory solid tumors, including non-Hodgkin lymphomas, histiocytoses (e.g. langerhans cell histiocytosis [LCH], juvenile xanthogranuloma [JXG], histiocytic sarcoma), and central nervous system (CNS) tumors are eligible; patients must have had histologic verification of malignancy at original diagnosis or relapse except in patients with intrinsic brain stem tumors, optic pathway gliomas, or patients with pineal tumors and elevations of cerebrospinal fluid (CSF) or serum tumor markers including alpha-fetoprotein or beta-human chorionic gonadotropin (HCG); in cases where patient enrolls prior to histologic confirmation of recurrent disease, patient is ineligible and should be withdrawn from study if histology fails to confirm recurrence; please note: Patients with Hodgkin lymphoma and plexiform neurofibroma are not eligible
• ELIGIBILITY CRITERIA FOR ENROLLMENT ONTO APEC1621SC: Tumor Testing Requirement: Tumor sample availability requirement for stage 1 of Pediatric MATCH (patients enrolled from start of study in July 2017 through 12/31/21); Patients must have an formalin-fixed paraffin-embedded (FFPE) tumor sample available for MATCH study testing from a biopsy or surgery that was performed at any point after initial tumor recurrence/progression, or be planned to have a procedure to obtain such a sample that is considered to be of potential benefit by the treating clinicians; a tumor sample from a clinically performed diagnostic (pre-treatment) biopsy will be acceptable for enrollment onto Pediatric MATCH only for children with high-grade gliomas of the brainstem (diffuse intrinsic pontine gliomas) or thalamus
• Please note: Samples that have been decalcified using standardly utilized acid-based decalcification methods are not generally suitable for MATCH study testing; the nucleic acids will have been degraded in the decalcification process
• ELIGIBILITY CRITERIA FOR ENROLLMENT ONTO APEC1621SC: Tumor molecular profiling report availability requirement for Stage 2 of Pediatric MATCH (patients enrolled starting 2022): In stage 2 of the study, no tumor samples will be submitted for centralized clinical tumor profiling; instead, a tumor molecular profiling report from a College of American Pathologists (CAP)/ Clinical Laboratory Improvements Amendments (CLIA)-approved testing laboratory must be submitted for review by the Molecular Review Committee (MRC)
• This molecular profiling must have been performed on a tumor sample that was obtained at any point after initial tumor recurrence/progression and must be accompanied by a pathology report for the same tumor specimen; a molecular profiling report for a diagnostic (pre-treatment) tumor sample will be acceptable for enrollment onto Pediatric MATCH only for children with high-grade gliomas of the brainstem (diffuse intrinsic pontine gliomas) or thalamus. In the event that molecular profiling reports are available from multiple timepoints, the most recent report should be prioritized for study submission
• ELIGIBILITY CRITERIA FOR ENROLLMENT ONTO APEC1621SC: Karnofsky >= 50% for patients > 16 years of age and Lansky >= 50 for patients =< 16 years of age); note: neurologic deficits in patients with central nervous system (CNS) tumors must have been stable for at least 7 days prior to study enrollment; patients who are unable to walk because of paralysis, but who are up in a wheelchair, will be considered ambulatory for the purpose of assessing the performance score
• ELIGIBILITY CRITERIA FOR ENROLLMENT ONTO APEC1621SC: Patients must have radiographically measurable disease; measurable disease based on imaging obtained less than or equal to 56 days prior to enrollment; patients with neuroblastoma who do not have measurable disease but have metaiodobenzylguanidine (MIBG) positive (+) evaluable disease are eligible; measurable disease in patients with CNS involvement is defined as any lesion that is at minimum 10 mm in one dimension on standard magnetic resonance imaging (MRI) or computed tomography (CT)
• Note: The following do not qualify as measurable disease:
• Malignant fluid collections (e.g., ascites, pleural effusions)
• Bone marrow infiltration except that detected by MIBG scan for neuroblastoma
• Lesions only detected by nuclear medicine studies (e.g., bone, gallium or positron emission tomography [PET] scans) except as noted for neuroblastoma
• Elevated tumor markers in plasma or CSF
• Previously radiated lesions that have not demonstrated clear progression post radiation
• Leptomeningeal lesions that do not meet the measurement requirements for Response Evaluation Criteria in Solid Tumors (RECIST) 1.1
• GENERAL INCLUSION CRITERIA FOR SUBPROTOCOLS: NOTE: patient does not need to meet all subprotocol criteria at time of enrollment onto the APEC1621SC screening protocol, but will need to meet all criteria prior to enrollment on any assigned treatment subprotocol. Patients must be enrolled onto a subprotocol within 2 weeks (14 days) of treatment assignment
• GENERAL INCLUSION CRITERIA FOR SUBPROTOCOLS: Karnofsky >= 50% for patients > 16 years of age and Lansky >= 50 for patients =< 16 years of age); Note: neurologic deficits in patients with CNS tumors must have been stable for at least 7 days prior to study enrollment; patients who are unable to walk because of paralysis, but who are up in a wheelchair, will be considered ambulatory for the purpose of assessing the performance score
• GENERAL INCLUSION CRITERIA FOR SUBPROTOCOLS: At the time of treatment with subprotocol specified therapy, the patients must have radiographically measurable disease; patients with neuroblastoma who do not have measurable disease but have MIBG+ evaluable are eligible; measurable disease in patients with CNS involvement is defined as any lesion that is at minimum 10 mm in one dimension on standard MRI or CT
• Note: The following do not qualify as measurable disease:
• Malignant fluid collections (e.g., ascites, pleural effusions)
• Bone marrow infiltration except that detected by MIBG scan for neuroblastoma
• Lesions only detected by nuclear medicine studies (e.g., bone, gallium or positron emission tomography [PET] scans) except as noted for neuroblastoma
• Elevated tumor markers in plasma or CSF
• Previously radiated lesions that have not demonstrated clear progression post radiation
• Leptomeningeal lesions that do not meet the measurement requirements for RECIST 1.1
• GENERAL INCLUSION CRITERIA FOR SUBPROTOCOLS: At the time of enrollment onto a subprotocol, the following general criteria for initiation of therapy will be required:
• Patients must have fully recovered from the acute toxic effects of all prior anticancer therapy and must meet the following minimum duration from prior anticancer directed therapy prior to enrollment to the subprotocol; if after the required timeframe, the numerical eligibility criteria are met, e.g. blood count criteria, the patient is considered to have recovered adequately
• Cytotoxic chemotherapy or other anticancer agents known to be myelosuppressive: for agents not listed, the duration of this interval must be discussed with the study chair and the study-assigned research coordinator prior to enrollment >= 21 days after the last dose of cytotoxic or myelosuppressive chemotherapy (42 days if prior nitrosourea)
• Anticancer agents not known to be myelosuppressive (e.g. not associated with reduced platelet or absolute neutrophil counts [ANC]): >= 7 days after the last dose of agent; for agents not listed, the duration of this interval must be discussed with the study chair and the study-assigned research coordinator prior to enrollment
• Antibodies: >= 21 days must have elapsed from infusion of last dose of antibody, and toxicity related to prior antibody therapy must be recovered to grade =< 1
• Corticosteroids: If used to modify immune adverse events related to prior therapy, >= 14 days must have elapsed since last dose of corticosteroid
• Hematopoietic growth factors: >= 14 days after the last dose of a long-acting growth factor (e.g. Neulasta) or 7 days for short-acting growth factor; for agents that have known adverse events occurring beyond 7 days after administration, this period must be extended beyond the time during which adverse events are known to occur; the duration of this interval must be discussed with the study chair and the study-assigned research coordinator
• Interleukins, interferons and cytokines (other than hematopoietic growth factors): >= 21 days after the completion of interleukins, interferon or cytokines (other than hematopoietic growth factors)
• Stem cell infusions (with or without total-body irradiation [TBI]):
• Allogeneic (non-autologous) bone marrow or stem cell transplant, or any stem cell infusion including donor lymphocyte infusion (DLI) or boost infusion: >= 84 days after infusion and no evidence of graft versus host disease (GVHD)
• Autologous stem cell infusion including boost infusion: >= 42 days
• Cellular therapy: >= 42 days after the completion of any type of cellular therapy (e.g. modified T cells, natural killer (NK) cells, dendritic cells, etc.)
• X-ray therapy (XRT)/External Beam Irradiation including Protons: >= 14 days after local XRT; >= 150 days after TBI, craniospinal XRT or if radiation to >= 50% of the pelvis; >= 42 days if other substantial bone marrow (BM) radiation; note: radiation may not be delivered to "measurable disease" tumor site(s) being used to follow response to subprotocol treatment
• Radiopharmaceutical therapy (e.g., radiolabeled antibody, 131I-MIBG): >= 42 days after systemically administered radiopharmaceutical therapy
• GENERAL INCLUSION CRITERIA FOR SUBPROTOCOLS: For patients with solid tumors without known bone marrow involvement:
• Peripheral absolute neutrophil count (ANC) >= 1000/mm^3
• Platelet count >= 100,000/mm^3 (transfusion independent, defined as not receiving platelet transfusions for at least 7 days prior to enrollment)
• GENERAL INCLUSION CRITERIA FOR SUBPROTOCOLS: Patients with known bone marrow metastatic disease will be eligible for study provided they meet the blood counts (may receive transfusions provided they are not known to be refractory to red cell or platelet transfusions); these patients will not be evaluable for hematologic toxicity
• GENERAL INCLUSION CRITERIA FOR SUBPROTOCOLS: Creatinine clearance or radioisotope glomerular filtration rate (GFR) >= 70 ml/min/1.73 m^2 or a serum creatinine based on age/gender as follows:
• Age: 1 to < 2 years; maximum serum creatinine (mg/dL): male 0.6; female 0.6
• Age: 2 to < 6 years; maximum serum creatinine (mg/dL): male 0.8; female 0.8
• Age: 6 to < 10 years; maximum serum creatinine (mg/dL): male 1; female 1
• Age: 10 to < 13 years; maximum serum creatinine (mg/dL): male 1.2; female 1.2
• Age: 13 to < 16 years; maximum serum creatinine (mg/dL): male 1.5; female 1.4
• Age: >= 16 years; maximum serum creatinine (mg/dL): male 1.7; female 1.4
• GENERAL INCLUSION CRITERIA FOR SUBPROTOCOLS: Bilirubin (sum of conjugated + unconjugated) =< 1.5 x upper limit of normal (ULN) for age
• GENERAL INCLUSION CRITERIA FOR SUBPROTOCOLS: Serum glutamate pyruvate transaminase (SGPT) (alanine transferase [ALT]) =< 135 U/L (for the purpose of this study, the ULN for SGPT is 45 U/L)
• GENERAL INCLUSION CRITERIA FOR SUBPROTOCOLS: Patients must be able to swallow intact capsules/tablets, unless otherwise specified in the subprotocol to which they are assigned
• GENERAL INCLUSION CRITERIA FOR SUBPROTOCOLS: Agent specific limitations on prior therapy will be included with specific treatment subprotocols
• GENERAL EXCLUSION CRITERIA FOR SUBPROTOCOLS: Pregnant or breast-feeding women will not be entered on this study due to risks of fetal and teratogenic adverse events as seen in animal/human studies, or because there is currently no available information regarding human fetal or teratogenic toxicities; pregnancy tests must be obtained in females who are post-menarchal; males or females of reproductive potential may not participate unless they have agreed to use an effective contraceptive method
• GENERAL EXCLUSION CRITERIA FOR SUBPROTOCOLS: Concomitant medications
• Corticosteroids: at the time of consent and enrollment to regimen specific subprotocols, patients receiving corticosteroids who have not been on a stable or decreasing dose of corticosteroid for at least 7 days prior to enrollment to the subprotocol will not be eligible; if used to modify immune adverse events related to prior therapy, >= 14 days must have elapsed since last dose of corticosteroid
• Investigational drugs: patients must meet criteria for prior therapy at the time of consent and enrollment to a subprotocol; other investigational agents may not be administered to patients while they are receiving study drug as part of a subprotocol
• Anticancer agents: patients must meet criteria for prior therapy at the time of consent and enrollment to a subprotocol; other investigational agents may not be administered to patients while they are receiving study drug as part of a subprotocol
• Anti-GVHD agents post-transplant: patients who are receiving cyclosporine, tacrolimus or other agents to prevent graft-versus-host disease post bone marrow transplant are not eligible
• GENERAL EXCLUSION CRITERIA FOR SUBPROTOCOLS: Patients who have an uncontrolled infection are not eligible
• GENERAL EXCLUSION CRITERIA FOR SUBPROTOCOLS: Patients who have had a prior solid organ transplant are not eligible
• GENERAL EXCLUSION CRITERIA FOR SUBPROTOCOLS: Additional agent specific criteria will be included with specific treatment subprotocols

• Culture positive pulmonary MAC meeting ATS/IDSA disease criteria
• Age over 18 years
• Ability to provide informed consent
• Fibrocavitary disease
• Planned surgery for MAC disease
• Patients who have cumulatively taken 6 weeks or more of multi-drug antimicrobial treatment for MAC
• Patients who are currently taking or have taken multi-drug antimicrobial treatment for NTM within the prior 30 days
• Diagnosis of Cystic fibrosis
• Diagnosis of HIV
• History of solid organ or hematologic transplant
• Significant drug-drug interaction not clinically manageable in the opinion of the investigator
• Contraindication to any component of the study treatment regimen

• Participant Inclusion Criteria (Part 1
•Longitudinal Analysis)
• CGD Patients Undergoing Transplant 1995 to Present with Birth Year In or After 1988 1. CGD Patients will be Defined by both Defective Neutrophil NADPH Oxidase Function and by Clinical History Consistent with CGD Patients must have both of: A functional assay demonstrating abnormal NADPH oxidase function (see A below); AND Clinical history consistent with CGD (see B below). ************************************************************************* Patients must have both "A" and "B": A. Function: Assays of NADPH Oxidase Function I. Dihydrorhodamine (DHR) Assay:
• Blood sample was obtained at a time when patient was clinically stable and not critically ill, with control samples performed simultaneously indicating a qualified assay; and
• Assay unequivocally demonstrates CGD with an stimulation index (SI) SI < 35 or equivalent. Assay report, including mean fluorescence intensity (MFI) from unstimulated and stimulated samples and gating strategy, must be de-identified and provided. OR II. Nitroblue Tetrazolium Oxidation Test (NBT): o Diagnostic of CGD (reported as reduced granulocyte oxidative response). Report must be de-identified and provided. AND B. Clinical History: One or More of the Following:
• Severe and/or recurrent infection (liver, perirectal or lung abscess; pneumonia; adenitis; or osteomyelitis) due to, for example, Staphylococcus aureus, Burkholderia sp, Serratia marcescens, non-albicans Candida sp, Aspergillus sp or other mold; or Nocardia sp or other deep tissue infection characteristic of CGD
• Sterile granulomatous disease in respiratory, gastrointestinal or urogenital tracts; or Crohn's disease-like colitis
• A family history consistent with either X-linked or autosomal recessive CGD In cases where either functional assay (A) or history (B) is equivocal, one or more of the following may be used to confirm a diagnosis of CGD: C. Absent or significantly reduced in expression or abnormal size of any of the 5 phox components (gp91 phox, p47 phox, p22 phox, p67phox, and p40phox) of NADPH oxidase, by either:
• Western blot
• Northern blot OR D. Mutation in a gene encoding one of the 5 phox components (gp91 phox, p47 phox, p22 phox, p67 phox, and p40 phox) of NADPH oxidase that is predictive of a decreased or absent oxidative burst. (Nonsense, frameshift, or previously described missense mutation associated with CGD). Molecular Diagnosis is Desirable In addition, molecular diagnosis (gene sequencing and expression analysis) of CGD is desirable and should be performed when possible. 2. Further Characterization of Oxidase Level, Longitudinal Study, Prospective Cohort Patients who are to undergo transplantation during the study period must be further characterized as oxidase-null or oxidase positive by level of oxidase production by either:
• DHR assay stimulation Index: where SI ≤ 2.5 will be classified as oxidase-null CGD. Those with SI > 2.5 will be classified as oxidase positive CGD. A single validated test that is accepted by the PID-CGD Review Panel is adequate, but testing on two occasions for validation is desirable. OR
• Ferricytochrome C reduction assay of granulocytes with O2 < 2.3 nmoles /106 cells/h classified as oxidase-null CGD. A single validated test that is accepted by the PID-CGD Review Panel is adequate, but testing on two occasions for validation is desirable. OR o Genetic sequencing reporting a mutation that is unequivocally associated to absent oxidase production. (e.g. null mutations) will be classified as oxidase-null CGD (See discussion in Appendix I for how family history, genotype and CGD mutation information will be applied to assigning patients lacking any quantitative oxidase activity measurements to residual oxidase-null or residual oxidase-positive groups). 3. Longitudinal Study, Retrospective Cohort Patients who have already been transplanted will be included regardless of whether further characterization by oxidase level (or genotype/mutation data) is possible or not.
• Non-Transplanted CGD Patients with Birth Year In or After 1988 A non-transplant (conventional therapy) group of CGD subjects will be enrolled in the longitudinal study. The non-transplant subjects will be selected from the potentially eligible (retrospective) patient cohort with diagnosis of CGD treated with conventional non-transplant therapy. Participating sites will enter their entire retrospective cohort of CGD patients having birth year in or after 1988 into the registration cohort for this protocol. Baseline for both non-transplant subjects and HCT subjects for the purpose of comparing survival will be the year of birth. However, for non-transplant subjects, many of the detailed analyses such as infection and autoimmune complication rates will be assessed in the year preceding the date of last contact.
• Participant Inclusion Criteria (Part 2
•Cross-Sectional Analysis) To participate in the Cross-Sectional Analysis, patients must have previously been enrolled into the Longitudinal Analysis of Protocol 6903. All transplanted subjects in the Cross-Sectional Analysis are surviving and shall have at least 3 years of follow-up post-transplant to be included. Non-transplanted CGD subjects will become eligible for consideration for the Cross-Sectional Analysis if they were eligible and enrolled in the retrospective cohort of the Longitudinal Analysis, and if/when they are > 3 years post-diagnosis of CGD. Provision of written informed consent will be required for inclusion in the Cross-Sectional Analysis.
• Participant Exclusion Criteria (Longitudinal and Cross- Sectional Analyses)
• Presence of other primary immunodeficiency syndromes that do not meet the clinical and laboratory criteria for CGD.
• Rac2 Deficiency
• Myeloperoxidase Deficiency (MPO Deficiency)
• Glutathione deficiency
• Leukocyte adhesion deficiency syndrome
• Non-transplant subjects:
• The above exclusions pertain.
• In addition, non-transplant subjects will be excluded if the only assessment of oxidase function available is the nitroblue tetrazolium (NBT) test (a non-quantitative test).

• WAS participants will be defined as males who have: 1. thrombocytopenia (< 100K) AND EITHER molecular diagnosis of WAS OR reduced WASP expression; OR 2. thrombocytopenia (< 100K) AND positive family history consistent with WAS diagnosis; OR 3. chronic thrombocytopenia (< 100K for minimum of 3 months) AND low mean platelet volume (MPV below normal range for age) AND EITHER recurrent and/or severe infections requiring treatment and/or eczema OR lack of antibody response to polysaccharide antigens or low IgM.
• Longitudinal Analysis (Retrospective and Prospective) 1. Stratum A. Participants with WAS who have or will Receive HCT
• Participants with WAS who have received an HCT since January 1, 1990 2. Stratum B. Participants with WAS who have or will Receive Gene Transfer
• Participants in which the intention is to treat with gene transfer with autologous modified cells
• Cross-Sectional Analysis (Strata A and B) 1. Participants with WAS who are surviving and at least 2 years after the most recent HCT or gene therapy.
• As this is a natural history study, for both the Longitudinal Analysis and the Cross-Sectional Analysis we will not exclude any patients due to race or age who fit the inclusion criteria.

• Stratum I
• Patients must be less than 18 years of age at the time of diagnosis.
• Patients must have histological verification of the diagnosis of Langerhans cell histiocytosis according to the criteria described in Section 6.1
• Signed informed consent form
• Stratum II
• Patients of Stratum I who have:
• Progressive disease (AD worse) in non-risk organs after 6 weeks (Initial Course
• AD intermediate or worse in non-risk organs or AD better in risk organs after 12 weeks (Initial Course 2)
• Disease progression (AD worse) in non-risk organs at any time during continuation treatment
• Active disease at the end of Stratum I treatment
• Disease reactivation in non-risk organs at any time after completion of Stratum I treatment
• Stratum III
• Patients from Stratum I who fulfill the following criteria:
• AD worse in risk organs after week 6 (after Initial Course 1), or AD worse or AD intermediate in risk organs after week 12 (after Initial Course 2).
• Presence of unequivocally severe organ dysfunction at the above mentioned evaluation points (hematological dysfunction, liver dysfunction, or both of them) as
• Hb <70 g/L (<7.0 g/dl) and/or transfusion dependency
• PLT <20 x109/L (20,000/μL) and/or transfusion dependency (both criteria have to be fulfilled) AND/OR
• Liver dysfunction (or digestive involvement with protein loss)
• Total protein <55 g/L or substitution dependency
• Albumin <25 g/L or substitution dependency (at least one of the two criteria to be fulfilled)
• Stratum IV
• Patients from Stratum I or Stratum III who fulfill the following criteria:
• AD worse in risk organs after week 6 (after Initial Course 1), or AD worse or AD intermediate in risk organs after week 12 (after Initial Course 2) of Stratum I OR
• AD worse after the 2nd and 3rd 2-CdA/Ara-C course, and those AD worse or AD intermediate after the 4th 2-CdA/Ara-C course of Stratum III AND
• Presence of unequivocally severe organ dysfunction at the above mentioned evaluation points (hematological dysfunction, liver dysfunction, or both of them) as defined in Table XI (see Section 10.3.1).
• Informed consent: All patients or their legal guardians (if the patient is <18 years of age) must sign an Ethics or institutional Review Board approved consent form indicating their awareness of the investigational nature and the risks of this study. When appropriate, younger patients will be included in all discussions in order to obtain assent.
• Adequate organ function: Patients should have adequate hepatic, renal, cardiac and pulmonary function to undergo reduced intensity HCT based upon local institutional guidelines, or at a minimum meet requirements noted in eligibility checklist Appendix A-VIII_1. However, significant hepatic and pulmonary dysfunction, if secondary to underlying LCH disease activity, will not exclude patients from protocol enrollment and should be discussed with the National PI Coordinator and the Coordinating Principal Investigator.
• Stratum V
• All patients with verified diagnosis of LCH and MRI findings consistent with ND-CNSLCH irrespective of previous treatments (also those not registered to other Strata ofLCH-IV).
• Patients with isolated tumorous CNS-LCH (including isolated DI with mass lesion in the hypothalamus-pituitary axis). In patients with already established diagnosis of LCH and radiologic finding of CNS lesions compatible with LCH, a biopsy of the lesion is not obligatory. In all other cases a biopsy of the lesion is needed for inclusion into the study
• Stratum VI -- Patients with newly diagnosed SS-LCH and localization other than "multifocal bone",isolated tumorous CNS lesion, or isolated "CNS-risk" lesion.
• Stratum VII -- All patients registered in LCH IV (regardless of treatment) as long as consent for longterm follow-up has not been withheld.
• Stratum I
• Pregnancy (patients of child-bearing age must be appropriately tested before chemotherapy)
• LCH-related permanent consequences (e.g. vertebra plana, sclerosing cholangitis, lung fibrosis, etc.) in the absence of active disease
• Prior systemic therapy
• Stratum II
• Patients with progressive disease in risk organs
• Permanent consequences (e.g. sclerosing cholangitis, lung fibrosis, etc.) without evidence of active LCH in the same organ or in any other locations
• No written consent of the patient or his/her parents or legal guardian
• Stratum III
• The presence of any of the following criteria will exclude the patient from the study:
• Isolated sclerosing cholangitis without evidence of active hepatic LCH as the only evidence of risk organ involvement.
• Inadequate renal function as defined by serum creatinine > 3x normal for age
• Stratum IV
• Pulmonary failure (requiring mechanical ventilation) not due to active LCH.
• Isolated liver sclerosis or pulmonary fibrosis, without active LCH.
• Uncontrolled active life-threatening infection.
• Decreased renal function with a GFR of less than 50ml/1.73m2/min.
• Pregnancy or active breast feeding
• Failure to provide signed informed consent
• Stratum VI
• Patients with SS-LCH who have an isolated tumorous CNS lesion (they are eligible for Stratum V),
• Patients with isolated "CNS-risk" or multifocal bone lesions (they are eligible for Stratum I, Group 2)

Strata A, B, and C (Part 1
•Retrospective Study)-
• Individuals with Severe Combined Immune Deficiency (SCID) diagnosis who: --were treated at a location participating in this consortium from 1968 until present, and --are not enrolled in RDCRN PIDTC-6901 (ClinicalTrials.gov ID: NCT01186913).
• Subjects who received HCT/GT/ERT prior to the present date are eligible for the retrospective study. The enrollment criteria for subjects who died prior to definitive therapy are the same as for Strata A, B and C. Stratum A, Typical SCID:
• Individuals who meet the following inclusion criteria and who received HCT are eligible for enrollment into Stratum A of the study:
• Absence or very low number of T cells (CD3 T cells < 300/microliter), and no or very low T cell function (< 10% of lower limit of normal) as measured by response to phytohemagglutinin (PHA) or cells of maternal origin present.
• If maternal cells are present but the patient does not meet criteria for very low T cell function as defined, the assigned reviewers for the potential subject, and if necessary, the full PID-SCID RP will review the laboratory report to determine if criteria of maternal engraftment are met for Protocol 6902.
• Laboratory report of testing for maternal engraftment is required, for evaluation by the PID-SCID RP. Stratum B, Leaky SCID, Omenn Syndrome, Reticular Dysgenesis: Individuals who meet the following criteria are eligible for enrollment into Stratum B of the study: Leaky SCID-
• Maternal lymphocytes tested for and not detected and,
• Either one or both of the following (a,b): a) < 50% of lower limit of normal T cell function (as measured by response to PHA OR < 50% of lower limit of normal T cell function as measured by response to CD3/CD28 antibody, b) Absent or < 30% lower limit of normal proliferative responses to candida and tetanus toxoid antigens postvaccination or exposure,
• AND at least one of the following (a through e): 1. Reduced number of CD3 T cells, 2. > 80% of CD3+ or CD4 T cells are CD45RO+,
• AND/OR >80% of CD3+ or CD4+ T cells are,CD62L negative,
• AND/OR >50% of CD3+ or CD4+ T cells express HLA-DR (at < 4 years of age),
• AND/OR are oligoclonal T cells. c) Hypomorphic mutation in IL2RG in a male, or homozygous hypomorphic mutation or compound heterozygosity with at least one hypomorphic mutation in an autosomal SCID-causing gene. d) Low TRECs and/or the percentage of CD4+/45RA+/CD31+ or CD4+/45RA+/CD62L+ cells is below the lower limit of normal. e) Functional testing in vitro supporting impaired, but not absent, activity of the mutant protein,
• AND does not meet criteria for Omenn Syndrome,
• AND does not have known selective loss of lymphocytes, Ataxia- Telangiectasia, or congenital heart defect associated with lymphopenia, unless a SCID genotype is also present. Omenn Syndrome (OS):
• Generalized skin rash,
• Maternal engraftment tested for and not detected,
• Absent or low (up to 30% of normal) T cell proliferation to antigens to which the patient has been exposed.
• If the proliferation to antigen was not performed, but at least 4 of the following 10 supportive criteria, at least one of which must be among those marked with an asterisk (*) are present, the patient is eligible: hepatomegaly; splenomegaly; lymphadenopathy; elevated IgE; elevated absolute eosinophil count; *oligoclonal T cells measured by CDR3 length or flow cytometry >80% of CD4+ T cells are CD45RO+ ;*proliferation to PHA is reduced <50% of lower limit of normal or SI <30; *proliferative response in mixed leukocyte reaction is reduced to increment cpm < 20% or SI <20; hypomorphic mutation to SCID causing gene; low TRECs and/or percentage of CD 4+/ RA+/CD31+; or CD4+/RA+/CD62L+ cells below the lower limit of normal. Reticular Dysgenesis (RD):
• Absence or very low number of T cells (CD3 T cells <300/microliter),
• No or very low (<10% of lower limit of normal) T cell function (as measured by response to phytohemagglutinin (PHA),
• Severe congenital neutropenia (absolute neutrophil count <200/microliter),
• AND at least one of the following:
• Sensorineural deafness and/or absence of granulopoiesis at bone marrow examination and/or a deleterious AK2 mutation,
• absence of granulopoiesis on bone marrow examination; a pathogenic mutation in the adenylate kinase 2 (AK2) gene identified. Stratum C, SCID with Non-HCT Treatments: -Individuals who meet the following criteria and were treated with PEG-ADA or gene therapy with autologous modified cells are eligible for enrollment into Stratum C (SCID with non-HCT treatments) of the study-
•Any SCID patient previously treated with a thymus transplant (includes intention to treat with HCT, as well as PEG-ADA ERT or gene therapy). Strata A, B, and C (Part 2
•Cross-Sectional Study): Patient inclusion criteria for the cross sectional study: Eligibility for Strata A, B and C are the same as for the retrospective study except that all the patients in the cross-sectional study are currently surviving and are at least 2 years post the most recent class of therapy. Parts 1 and 2
•Retrospective and Cross-Sectional Studies -
• Lack of appropriate testing to rule out HIV infection after 1997 (p24 antigen or more sensitive) or other cause of secondary immunodeficiency,
• Presence of DiGeorge syndrome,
• Most patients with other PIDs such as nucleoside phosphorylase deficiency, ZAP70 deficiency, CD40 ligand deficiency, NEMO deficiency, XLP, cartilage hair hypoplasia or ataxia telangiectasia will not meet the inclusion criteria for Stratum A, B, or C above; however, a patient with one of the above may meet the inclusion criteria for Stratum B and if so will be included-
• MHC Class I and MHC Class II antigen deficiency are excluded,
• Metabolic conditions that imitate SCID or related disorders such as folate transporter deficiency, severe zinc deficiency, transcobalamin deficiency.

• Part A:
• Less than 5 years of age at the first study visit.
• Documentation of a CF diagnosis. Part B:
• Participated in Part A OR less than 6 years of age at the first study visit.
• Documentation of a CF diagnosis.
• CFTR mutations consistent with FDA labeled indication of highly effective modulator therapy (ivacaftor or elexacaftor/tezacaftor/ivacaftor).
• Physician intent to prescribe ivacaftor or elexacaftor/tezacaftor/ivacaftor.
• Part A and Part B: Use of an investigational drug within 28 days prior to and including the first study visit. Use of ivacaftor or elexacaftor/tezacaftor/ivacaftor within the 180 days prior to and including the first study visit. Use of chronic oral corticosteroids within the 28 days prior to and including the first study visit.

Pregnant Women- Pregnant women who meet all of the following criteria are eligible for enrollment as study participants: 1. Age 18 years or older 2. Able to understand the oral and written instructions associated with study visits and procedures and provide informed consent 3. Pregnant at any stage 4. Planning to give birth at a study-site designated center 5. Agrees to enroll offspring into the study at birth 6. In the case of multiple gestation, agrees to enroll only one child who will be selected by randomized birth order Biological Fathers- Biological fathers who meet all of the following criteria are eligible for enrollment as study participants: 1. Age 18 years or older 2. Able to understand the oral and written instructions associated with study visits and procedures and provide informed consent Pregnant Women- Pregnant women who meet any of these criteria are not eligible for enrollment: 1. Inability or unwillingness to comply with study protocol 2. Serious pregnancy complication (in the judgement of the investigator) prior to enrollment 3. Fetus has a major chromosomal anomaly 4. Plans to move and would not be available for in-person visits at a study site 5. Plans to give up her child for adoption at birth 6. Pregnancy is the result of an egg donation Infants- Infants who meet any of these criteria are not eligible for enrollment: 1. Delivered earlier than 34 weeks of gestation 2. Sibling already enrolled 3. Born with a significant birth defect or medical condition, and in the judgment of the investigators, participation is not in the infant's best interest Biological Father- 1. Biological fathers who are unable or unwilling to comply with the study protocol as it pertains to the biological father's participation are not eligible for enrollment ----Note Regarding Legal Guardians who are not the Biological Parents: 1. At screening for enrollment of either the mother or the child, if the biological mother intends to give the infant up for adoption, neither the mother nor the child are eligible for enrollment 2. If the biological mother gives up legal guardianship of the child during the child's follow-up period, the child may remain enrolled as long as the new legal guardian:
• Agrees to meet the child's study requirements, and
• Provides written informed consent for the child's continued participation. 3. Throughout the protocol where it refers to the mother, father, or parent answering questionnaires about the child or collecting samples from the child and the child's primary home, the legal guardian who provides consent for the child's participation may complete those procedures

• Pregnant, intending to continue pregnancy, enrolled in the Cystic Fibrosis Foundation Patient Registry (CFFPR)
• None

• Age18 ≤ 75 years
• Have BKV infection/viremia following kidney transplantation, where BKV viremia is defined as positive BKV qPCR (≥ 250 copies)
• Have evidence of invasive BKV infection (BK Nephropathy)
• Experience one of the following:
• New, persistent and/or worsening BKV-related symptoms, signs and/or markers of end organ compromise despite being on lower immunosuppressive medication
• Adverse effects of lower immunosuppressive medications (e.g., dnDSA, biopsy proven rejection)
• Eligible Donor
• Provide Written informed consent
• Non-kidney organ transplant recipient
• Patient with acute rejection of the kidney allograft at time of T-cell transfer
• Patient receiving steroids (>0.5 mg/kg body weight (BW) prednisone equivalent) at the time of T-cell transfer
• Patient treated with Thymoglobulin (ATG), Alemtuzumab or T-cell immunosuppressive monoclonal antibodies within 28 days prior to T-cell transfer
• Extra renal tissue invasive BK infection
• Concomitant enrollment in another clinical trial interfering with endpoints of this study
• Any medical condition which could compromise participation in the study according to the investigator's assessment
• Known HIV infection
• Female patient who is pregnant or breast-feeding, or adult of reproductive potential not willing to use an effective method of birth control during study treatment Note: Women of childbearing potential must have a negative urine pregnancy test at study entry.
• Patients unwilling or unable to comply with the protocol or unable to give informed consent Donor Eligibility
• ≥ 18 years old
• Available and capable of undergoing a single standard 2 blood volume leukapheresis
• HLA Compatible (see Donor selection priority below):
• Original kidney transplant donor
• Fully HLA matched family member (6/6 HLA match considering HLA-A, HLA-B and HLA-DRB1 genes)
• Partially matched family member (≥ 2/6 HLA match, considering HLA-A, HLA-B and HLA-DRB1 genes)
• BK IgG seropositive
• Meets the criteria for donor eligibility defined in the UW Program for Advanced Cell Therapy Standard Operating Policies and Procedures for Donor Evaluation and Eligibility Determination for the Donation of Viral Specific T Cells, which is in compliance with FACT standards for Immune Effector Cells, and 21 CFR 1271, subpart C.
• Provide written informed consent Donor selection priority: The original kidney donor will be the first choice of donor peripheral mononuclear cells. If the original donor is not available or does not meet all donor eligibility criteria, alternative related donors will be selected, with preference for fully matched related donors (6/6 HLA match, considering HLA-A, -B, and -DRB1 genes) over related donors with partial HLA match (≥ 2/6 HLA match, considering HLA-A, -B, and -DRB1 genes). Note that if the selected donor is related, but not a biological parent or child of the recipient (i.e., at least haploidentical), then high resolution testing of HLA-A and HLA-B will be performed on donor and recipient (if high resolution HLA genotyping not already available in the medical record). If the degree of matching at high resolution reveals a less favorable match than an alternative donor, then prioritization of the alternative donor will occur.

• Participant must be neurologically normal, defined as free of unstable neurologic and psychiatric disease as confirmed by a normal neurologic examination at screening
• Participant (GBCA-exposed or controls) agrees to undergo unenhanced magnetic resonance imaging (UE-MRI) of the brain at enrollment and at the end of the observation period (5 years)
• Participants should have at least 1 of the following indications: a) Medium to high risk for breast cancer or dense breasts undergoing breast cancer screening with MRI, b) Elevated prostate-specific antigen (PSA) and under active diagnostic surveillance for prostate cancer, c) Chronic liver disease (eg, liver cirrhosis limited to Child class A, post-hepatitis chronic hepatopathy, or primary sclerosing cholangitis) for surveillance of hepatocellular carcinoma development, d) Low-grade colorectal cancer or neuroendocrine tumor undergoing screening for liver metastases or e) Branch-duct intraductal papillary mucinous neoplasm (IPMN) of the pancreas (maximum size ≤2 cm) undergoing imaging surveillance. In addition, for participants in the GBCA Arms only:
• Each participant should be likely to undergo ≥5 GBCA-enhanced MR examinations with the same GBCA at least annually throughout the 5-year study duration
• Prospective participants with up to 3 well documented GBCA administrations prior to study screening are acceptable, provided that the imaging was performed with the same GBCA as the one to be prospectively used in the study. If the GBCA used cannot be identified, he/she cannot be enrolled. For the Control Arm:
• Participants who never had and are not likely to receive any GBCA injection during the course of the study
• Each control participant must be willing to undergo UE-MRI of the brain at baseline and at Year 5. In Years 1 to 4, the control participants will undergo their clinically indicated UE-MRIs, computed tomography (CT), ultrasound, or X-ray procedures
• As evidenced by history or determined in the neurologic exam at screening, concurrent neurological and/or psychiatric disease (or treatments) that could influence the results of the study's motor and cognitive tests (e.g. Cerebrovascular disease, Multiple sclerosis, Neurodegenerative disease, Malignant disease other than listed in indications, Carcinoid tumors, Epilepsy, Prior neurosurgery, Psychotic disorders or any prior psychotic episode not otherwise specified
•any documented prior history of chronic schizophrenia, Remittent or current medically confirmed major depressive disorder or bipolar disorder, History of long-term major depression or bipolar affective disorder with an active episode in the past 2 to 5 years, Neurodevelopmental disorders (eg, trisomy 21), Uncontrolled severe migraine, Uncontrolled or controlled anxiety or depression within 6 months before enrollment, Screening scores of ≤24 on the MMSE and/or ≥11 on the Hospital Anxiety and Depression Scale (HADS)).
• Prior, planned, or ongoing chemotherapy or brain irradiation
• Use of concomitant medication(s) affecting neuro-cognitive or motor function
• Substance or alcohol abuse as determined by the investigator
• Alcoholic cirrhosis
• Renal disease, defined as estimated glomerular filtration rate (eGFR) < 60 mL/min/1.73 m2
• History of environmental/occupational/other exposure to one or more chemicals that may affect cognitive and/or motor function, including, but not limited to, heavy metals (arsenic [As], cadmium [Cd], lead [Pb], manganese [Mn], and mercury [Hg]), pesticides, solvents, or carbon monoxide.
• Clinical indications requiring >1 contrast enhanced magnetic resonance imaging (CE-MRI) every 6 months
• Pregnant or nursing (lactating) women
• Presence of any metal-containing joint implants/prostheses In addition, for participants in either of the GBCA Arms only:
•Receipt of a GBCA or generic prior to study entry other than the specific GBCA to be administered during the course of the study. For participants in the Control Arm only:
• Participants with any previous exposure to a GBCA.
• Participants with any contraindication to UE-MRI examinations.

Individuals who meet all the following criteria are eligible for enrollment as study participants- 1. Able to understand and provide informed consent 2. Individual ≥18 years of age. 3. Recipient of a kidney or liver transplant ≥12 months prior to enrollment, without allograft rejection in the 6 months preceding enrollment 4. Negative for anti-donor human leukocyte antigens (HLA) antibodies at screening (Central Lab Test Determination). 5. Currently taking one of the following tacrolimus-based immunosuppressive regimens:
• Tacrolimus plus Mycophenolate Mofetil (MMF) or Mycophenolic Acid (MPA), with or without a corticosteroid
• Tacrolimus with trough ≥ 5ng/mL with or without ≤5 mg of prednisone or equivalent 6. Received a minimum of 3 doses of either the Moderna coronavirus infectious disease 19 (COVID-19) vaccine or Pfizer-BioNTech COVID-19 vaccine 7. Participant must be ≥ 60 days after completion of primary vaccination or receipt of the most recent booster dose with any authorized or approved monovalent or bivalent COVID-19 vaccine at the time of study vaccine. 8. Serum antibody negative or low (titer ≤ 2500 U/mL) at ≥ 30 days from the last dose of mRNA COVID-19 vaccine and ≥ 30 days following receipt of a monoclonal antibody product or convalescent plasma for COVID-19, measured using the Roche Elecsys® anti-SARS-CoV-2 S assay. 9. Participant's transplant physician or midlevel practitioner who is clinically licensed to prescribe and manage immunosuppression must confirm the participant's eligibility based on medical history. Individuals who meet any of these criteria are not eligible for enrollment as study participants- 1. Currently on an immunosuppressive regimen different from the three regimens described in the Inclusion Criteria, for example (but not limited to) those including sirolimus, everolimus, belatacept, or azathioprine 2. Recipient of any allograft other than a kidney or liver 3. Participant is pregnant 4. Any past history of Donor Specific Antibody (DSA) using local site standards 5. Prior receipt of the Moderna COVID-19 Vaccine 2023-2024 or Pfizer-BioNTech COVID-19 Vaccine 2023-2024. 6. Currently taking any systemic immunosuppressive agent, other than their prescribed transplant immunosuppression 7. Known history of severe allergic reaction to any component of an authorized or licensed COVID-19 vaccine 8. Thrombotic events, myocarditis, or pericarditis temporally associated with a prior dose of COVID-19 vaccine 9. History of heparin-induced thrombocytopenia 10. Any change in transplant immunosuppression regimen (drug or dose) in response to suspected or proven rejection within the last 6 months 11. More than minimal graft dysfunction, in accordance with study definition 12. Receipt of any cellular depleting agent (e.g. antithymocyte globulins (ATG), rituximab, alemtuzumab, Cyclophosphamide) within 12 months preceding enrollment 13. Concurrent autoimmune disease at risk for exacerbation with immunosuppression reduction 14. Any untreated active infection including BK viremia >10^4 copies 15. Infection with human immunodeficiency virus (HIV) 16. Recent (within one year) or ongoing treatment for malignancy with the exception of:
• Non- melanomatous skin cancer definitively treated by local therapy, and
• Definitively treated carcinoma-in-situ of the cervix (Stage 0 cervical cancer) 17. Treatment or prophylaxis of COVID-19 with a monoclonal antibody product or convalescent plasma within 6 months preceding enrollment, or 18. Any past or current medical problems, treatments, or findings which, in the opinion of the investigator, may:
• pose additional risks from participation in the study,
• interfere with the candidate's ability to comply with study requirements, or
• impact the quality or interpretation of the data obtained from the study.

1. Able to understand and provide informed consent 2. Individual ≥ 18 years of age. 3. Recipient of kidney transplant >=12 months prior to enrollment, without treated allograft rejection in the 6 months preceding enrollment 4. Maintenance immunosuppressive regimen consisting of CNI and mycophenolate mofetil or mycophenolate, with or without <= 5mg/day prednisone or equivalent 5. Received completed primary series (3 doses) of mRNA vaccine (either the Moderna COVID-19 vaccine or Pfizer-BioNTech COVID-19 vaccine) as specified in the respective package inserts 6. Receipt a COVID-19 bivalent mRNA booster (Moderna or Pfizer-BioNTech) >30 days prior to enrollment. 7. Serum antibody titer up to 2500 U/mL at >=30 days from the last dose of mRNA COVID-19 vaccine and =>30 days following receipt of a monoclonal antibody product or convalescent plasma for COVID-19, measured using the Roche Elecsys(R) anti-SARS-CoV-2 S assay 8. Platelet count greater than 30,000/cu mm must be confirmed in participants with a known history of bleeding disorder or thrombocytopenia (platelet count <50,000/cu mm) 9. A female participant is eligible to participate if she is not pregnant or breastfeeding and one of the following conditions applies: 1. Is of non-childbearing potential. To be considered of non-childbearing potential, a female must be post-menopausal for at least 1 year or surgically sterile OR 2. Is of childbearing potential and agrees to use an effective contraceptive method or abstinence for 12 weeks post vaccine and while taking mycophenolate mofetil/mycophenolic acid 1. Recipient of any number of doses of any COVID vaccine product other than the Moderna COVID-19 vaccine or the Pfizer-BioNTech COVID-19 vaccine 2. Recipient of any organ other than a kidney 3. Known current or prior Donor Specific Antibody (DSA) 4. Any change in transplant immunosuppression regimen (drug or dose) in response to suspected or proven rejection within the last 6 months 5. Known diagnosis of COVID-19 since last antibody test 6. Receipt of a monoclonal antibody product or convalescent plasma within the last 30 days 7. Known history of hypersensitivity to any of the vaccine components, or history of a life-threatening reaction to a vaccine containing any of the same substances. (components listed in Section 6, and the CoV2 and AS03 Investigator's Brochure) 8. Bleeding disorder, or receipt of anticoagulants in the past 21 days preceding inclusion, contraindicating intramuscular (IM) vaccination based on Investigator's judgment 9. Moderate or severe acute illness/infection (according to investigator judgment) on the day of vaccination or febrile illness (temperature >=38.0°C [>=100.4°F]). A prospective participant should not be included in the study until the condition has resolved or the febrile event has subsided 10. Receipt of any vaccine in the 30 days preceding the study vaccine or planned vaccines in the 30 days following the study vaccine 11. Estimated Glomerular Filtration Rate <30mL/min/1.73m^2 12. Receipt of any cellular depleting agent (e.g. Antithymocyte globulin (ATG), Rituximab, Alemtuzumab, Cyclophosphamide) within 12 months preceding enrollment 13. Receiving systemic immunomodulatory medication(s) for any condition other than transplant 14. Any uncontrolled active infection 15. Infection with human immunodeficiency virus (HIV) 16. Maintenance immunosuppressive regimen that includes anything other than a CNI, mycophenolate/mycophenolate mofetil, and =< 5mg/day prednisone or equivalent 17. Recent (within one year) or ongoing treatment for malignancy, except for definitive surgical treatment of localized skin cancers 18. Any unstable acute or chronic illness, treatments, or findings which, in the opinion of the investigator, may pose additional risks from participation in the study, may interfere with the c candidate's ability to comply with study requirements or may impact the quality or interpretation of the data obtained from the study

Part A Main 1. Capable of giving signed informed consent. 2. Subject who has a signed and dated Informed Consent Form (ICF). 3. Subject must be 18 to 50 years inclusive, at the time of signing the ICF. 4. Male or female. 5. Female subjects who are not of childbearing potential (or females of childbearing potential who agree to comply with the contraceptive requirements of the clinical trial protocol). 6. Good general health, as determined by the Investigator. 7. A positive SPT to histamine. The following additional inclusion criteria are only applicable to the healthy subjects in Group A1: 8. Healthy subjects (non-atopic) with no clinically significant co-morbidity (including broncho-reactive airway disease like asthma, current allergic rhinitis, etc.). 9. Subjects with no history of allergy or intolerance to peanut or any other food and who consume peanuts with no effect. 10. Subjects with lack of sensitivity to peanut allergen confirmed by SPT using whole peanut extract. 11. Peanut specific immunoglobulin E (IgE) <0.1 kU/L. 12. Ara h 2 specific IgE <0.1 kU/L. 13. Subjects with negative basophil activation test (BAT). The following additional inclusion criteria are only applicable to the subjects with PA in Group A2: 14. Clinical history of physician diagnosed PA. 15. Peanut allergen sensitivity confirmed by SPT and IgE. 16. Subjects who currently adhere to a strict peanut-free diet and who agree to continue this for the duration of the clinical trial. 17. Subjects who are able to handle and correctly use an adrenaline auto-injector. Part B Main 1. Capable of giving signed informed consent. 2. Subject who has a signed and dated ICF. 3. Subjects aged 18 to 50 years of age inclusive, at the time of signing the ICF. 4. Male or female. 5. Female subjects who are not of childbearing potential (or females of childbearing potential who agree to comply with the contraceptive requirements of the clinical trial protocol). 6. Clinical history of physician diagnosed PA. 7. Peanut allergen sensitivity confirmed by SPT and IgE (Peanut specific IgE ≥5.0 kU/L and Ara h 2 specific IgE ≥2.0 kU/L) 8. Subjects with positive BAT. 9. Subjects who currently adhere to a strict peanut-free diet and who agree to continue this for the duration of the clinical trial. 10. Good general health, as determined by the Investigator. 11. Subjects who are able to handle and correctly use an adrenaline auto-injector. Main Exclusion Criteria Part A and B: 1. Pregnant or lactating subject. 2. Presence of any medical condition that may reduce the ability to survive a serious allergic reaction. 3. Subjects with atopic dermatitis with >25% skin surface involvement. 4. For subjects with PA, presence of severe, poorly controlled or uncontrolled asthma. 5. History of severe or life-threatening anaphylactic reactions to peanut resulting in neurological compromise or requiring mechanical ventilation. 6. Clinical history of severe systemic or life-threatening anaphylactic reactions to other foods (apart from peanut), insect venom, exercise, drugs, etc. or idiopathic anaphylaxis. 7. Unable to receive epinephrine therapy or at greater risk of developing adverse reactions after epinephrine administration as assessed by the site Investigator. 8. Clinical history of drug or alcohol abuse, which, in the Investigator's opinion, could interfere with the subject's ability to participate in the clinical trial. 9. Participation in a clinical research trial with any investigational drug/placebo within 3 months of screening (Visit 1) or concomitantly with this clinical trial. 10. Personal, financial or other dependent relationship (e.g., employee or immediate relative) with the clinical trial site, Sponsor, Sponsor's representative, or another individual who has access to the clinical trial protocol. 11. Vulnerable subjects or those in judicial or governmental detention, detainment or imprisonment in a public institution.

• Diagnosis of MG with generalized muscle weakness meeting the clinical criteria defined by Myasthenia Gravis Foundation of America (MGFA) Class II, III or IV
• Positive serological test for autoantibodies against AChR
• History of thymectomy, or any other thymic surgery within 12 months prior to Screening
• Untreated thymic malignancy, carcinoma, or thymoma
• History of Neisseria meningitidis infection
• Pregnancy, breastfeeding, or intention to conceive during the course of the study

Key
• Completed study drug treatment in a parent study VX20-121-102 (NCT05033080) and VX20-121-103 (NCT05076149); or had study drug interruption(s) in a parent study but did not permanently discontinue study drug, and completed study visits up to the last scheduled visit of the Treatment Period in the parent study Key
• History of drug intolerance in a parent study
• Pregnant or breast-feeding females Other protocol defined Inclusion/Exclusion criteria may apply.

Key
• Participants with stable CF and at least 1 TCR mutation (including F508del) in the CFTR gene Key
• History of solid organ, hematological transplantation, or cancer
• Hepatic cirrhosis with portal hypertension, moderate hepatic impairment (Child Pugh Score 7 to 9), or severe hepatic impairment (Child Pugh Score 10 to 15)
• Lung infection with organisms associated with a more rapid decline in pulmonary status Other protocol defined Inclusion/Exclusion criteria may apply.

• All genders ≥ 6 years of age at Visit 1
• Documentation of a CF diagnosis
• Clinician intent to treat index CF PEx with a planned 14-day course of IV antimicrobials
• At least one documented Pa positive culture within two years prior to Visit 1
• Participant is not pregnant
• No known renal impairment or history of solid organ transplantation
• No IV antimicrobial treatment, ICU admission, pneumothorax, or hemoptysis within 6 weeks prior to Visit 1
• No use of investigational therapies, new CF transmembrane conductance regulator (CFTR) modulators, or treatment for Nontuberculous mycobacteria (NTM) within 4 weeks prior to Visit 1
• No history of hypersensitivity, vestibular, or auditory toxicity with aminoglycosides
• No more than one day of IV aminoglycosides administered for the current PEx treatment prior to Visit 1

• Female participants: Agreement to remain abstinent (refrain from heterosexual intercourse) or use contraception as defined by the protocol
• Diagnosis of macular edema associated with non-infectious uveitis (NIU)
• Diagnosis of active or inactive, acute, or chronic NIU of any etiology and of any anatomical type (anterior, intermediate, posterior, panuveitis)
• BCVA letter score of 73 to 19 letters (inclusive) on Early Treatment Diabetic Retinopathy Study (EDTRS)-like charts
• Evidence of active or latent syphilis infection
• Evidence of active or latent tuberculosis infection and/or positive tuberculosis assay, or previous or current HIV diagnosis
• Serious acute or chronic medical or psychiatric illness
• History of major ocular and non-ocular surgical procedures
• Uncontrolled IOP or glaucoma or chronic hypotony
• Any anatomical changes or media opacity in the study eye preventing evaluation of retina, vitreous, and capture of study images
• Prior use of IVT biologics including anti-VEGFs less than 2-4 months prior to Day 1; received IVT Methotrexate within 4 months prior to Day 1
• Prior macular laser therapy, cataract surgery within 6 months and laser capsulotomy within 3 months of Day 1
• Topical corticosteroids and/or topical NSAID > 3 drops per day in the 14 days prior to Day 1 (D1); intraocular or periocular corticosteroid injections in the 2 months prior to D1; subconjunctival corticosteroid injection within 1 month prior to Day 1; an OZURDEX implant in the 4 months prior to D1; YUTIQ, RETISERT or ILUVIEN implant in the 3 years prior to D1
• Diagnosis of macular edema due to any cause other than NIU
• Any major ocular conditions that may require medical or surgical intervention during the study period to prevent vision loss

• have documented evidence of rCDI (≥1 recurrence after a primary CDI episode)
• be undergoing antibiotic treatment for the qualifying rCDI episode that was diagnosed by a stool test for the presence of toxigenic C. difficile or C. difficile toxin
• be eligible for FMT as judged by the investigator or current treatment guidelines for rCDI in the US
• be a candidate for colonoscopy as judged by the investigator
• Use or planned use of systemic antibiotics for an indication other than the qualifying rCDI episode.
• Current uncontrolled chronic diarrhea not related to CDI.
• Receipt of CDI vaccine or treatment with CDI monoclonal antibodies within the past 12 months before screening.
• Evidence of active, severe, or fulminant colitis, diagnosis of toxic megacolon or have a current colostomy or ileostomy

Key
• Body mass index is less than (<) 30.0 kilograms per meter square (kg/m^2)
• A total body weight greater than (>) 50 kg
• Stable CF disease
• CFTR gene mutations on both alleles that are not responsive to CFTR modulator therapy o Example mutations include but are not limited to, mutations that do not produce CFTR protein (i.e., Class I): nonsense mutations (e.g., G542X, W1282X) and canonical splice mutations (e.g., 621+1G->T)
• Forced expiratory volume in 1 second (FEV1) value for SAD: greater than or equal to (≥)40 percent (%), MAD: ≥ 40% to less than or equal to (≤) 90% Key
• History of uncontrolled asthma within a year prior to screening
• History of solid organ or hematological transplantation
• Hepatic cirrhosis with portal hypertension, moderate hepatic impairment (Child Pugh Score 7 to 9), or severe hepatic impairment (Child Pugh Score 10 to 15)
• Arterial oxygen saturation on room air less than (<) 94% at screening Other protocol defined Inclusion/Exclusion criteria may apply.

• Patients must be 5 to 60 years of age at the time of enrollment
• Patients with newly diagnosed untreated histologically confirmed classic Hodgkin lymphoma (cHL) (nodular sclerosis, mixed cellularity, lymphocyte-rich, or lymphocyte-depleted, or not otherwise specified [NOS]) with stage I or II disease
• Patients must have bidimensionally measurable disease (at least one lesion with longest diameter >= 1.5 cm)
• Patients must have a whole body or limited whole body PET scan performed within 42 days prior to enrollment. PET-CT is strongly preferred. PET-MRI allowed if intravenous contrast enhanced CT is also obtained
• Pediatric patients (age 5-17 years) must have an upright posteroanterior (PA) chest X-ray (CXR) for assessment of bulky mediastinal disease. Adult patients must have either a CXR or CT chest
• Patients >= 18 years must have a performance status corresponding to Zubrod scores of 0, 1 or 2
• Patients =< 17 years of age must have a Lansky performance score of >= 50
• Pediatric patients (age 5-17 years): A serum creatinine based on age/gender as follows (within 7 days prior to enrollment):
• 2 to < 6 years (age): 0.8 mg/dL (male), 0.8 mg/dL (female)
• 6 to < 10 years (age): 1 mg/dL (male), 1 mg/dL (female)
• 10 to < 13 years (age): 1.2 mg/dL (male), 1.2 mg/dL (female)
• 13 to < 16 years (age): 1.5 mg/dL (male), 1.4 mg/dL (female)
• >= 16 years (age): 1.7 mg/dL (male), 1.4 mg/dL (female) OR a 24 hour urine creatinine clearance >= 50 mL/min/1.73 m^2 (within 7 days prior to enrollment) OR a glomerular filtration rate (GFR) >= 50 mL/min/1.73 m^2 (within 7 days prior to enrollment). GFR must be performed using direct measurement with a nuclear blood sampling method OR direct small molecule clearance method (iothalamate or other molecule per institutional standard)
• Note: Estimated GFR (eGFR) from serum or plasma creatinine, cystatin C or other estimates are not acceptable for determining eligibility
• For adult patients (age 18 years or older) (within 7 days prior to enrollment): Creatinine clearance >= 30 mL/min, as estimated by the Cockcroft and Gault formula or a 24-hour urine collection. The creatinine value used in the calculation must have been obtained within 28 days prior to registration. Estimated creatinine clearance is based on actual body weight
• Total bilirubin =< 2 x upper limit of normal (ULN) (within 7 days prior to enrollment)
• Unless due to Gilbert's disease, lymphomatous involvement of liver or vanishing bile duct syndrome
• Aspartate aminotransferase (AST) =< 3 x ULN (within 7 days prior to enrollment)
• Unless due to Gilbert's disease, lymphomatous involvement of liver or vanishing bile duct syndrome
• Alanine aminotransferase (ALT) =< 3 x ULN (within 7 days prior to enrollment)
• Unless due to Gilbert's disease, lymphomatous involvement of liver or vanishing bile duct syndrome
• Shortening fraction of >= 27% by echocardiogram (ECHO), multigated acquisition scan (MUGA), or functional cardiac imaging scan (within 7 days prior to enrollment) or ejection fraction of >= 50% by radionuclide angiogram, ECHO, MUGA, or cardiac imaging scan (within 7 days prior to enrollment)
• Diffusion capacity of the lung for carbon monoxide (DLCO) >= 50% of predicted value as corrected for hemoglobin by pulmonary function test (PFT) (within 7 days prior to enrollment). If unable to obtain PFTs, the criterion is: a pulse oximetry reading of > 92% on room air
• Known human immunodeficiency virus (HIV)-infected patients on effective anti-retroviral therapy with undetectable viral load within 6 months are eligible for this trial
• For patients with evidence of chronic hepatitis B virus (HBV) infection, the HBV viral load must be undetectable on suppressive therapy, if indicated. Patients with a history of hepatitis C virus (HCV) infection must have been treated and cured. For patients with HCV infection who are currently on treatment, they are eligible if they have an undetectable HCV viral load
• Patients with nodular lymphocyte predominant Hodgkin lymphoma
• Patients with a history of active interstitial pneumonitis or interstitial lung disease
• Patients with a diagnosis of inherited or acquired immunodeficiency that is poorly controlled or requiring active medications, such as primary immunodeficiency syndromes or organ transplant recipients
• Patients with any known uncontrolled intercurrent illness that would jeopardize the patient's safety such as infection, autoimmune conditions, cardiac arrhythmias, angina pectoris, and gastrointestinal disorders affecting swallowing and/or absorption of pills
• Patients with a condition requiring systemic treatment with either corticosteroids (defined as equivalent to > 10 mg daily prednisone for patients >= 18 years or > 0.5 mg/kg [up to 10 mg/day] for patients < 18 years) or other immunosuppressive medications within 14 days prior to enrollment
• Note: Replacement therapy such as thyroxine, insulin, or physiologic corticosteroid for adrenal or pituitary insufficiency is not considered a form of systemic treatment. Inhaled or topical steroids, and adrenal replacement doses (=< 10 mg daily for patients >= 18 years or =< 0.5 mg/kg [up to 10 mg/day] prednisone equivalents) are permitted in the absence of active autoimmune disease
• Note: Steroid use for the control of Hodgkin lymphoma symptoms is allowable, but must be discontinued by cycle 1, day 1
• Patients with peripheral neuropathy > grade 1 at the time of enrollment or patients with known Charcot-Marie-Tooth syndrome
• Patients with a prior or concurrent malignancy whose natural history or treatment has the potential to interfere with the safety or efficacy assessment of the investigational regimen
• Administration of prior chemotherapy, radiation, or antibody-based treatment for cHL
• Prior solid organ transplant
• Prior allogeneic stem cell transplantation
• Live vaccine within 30 days prior to planned day 1 of protocol therapy (e.g., measles, mumps, rubella, varicella, yellow fever, rabies, bacillus calmette guerin [BCG], oral polio vaccine, and oral typhoid). Administration of messenger ribonucleic acid (mRNA) vaccines are permitted
• Female patients who are pregnant since fetal toxicities and teratogenic effects have been noted for several of the study drugs. A pregnancy test within 28 days prior to enrollment is required for female patients of childbearing potential
• Lactating females who plan to breastfeed their infants starting with the first dose of study therapy and for at least 6 months after the last treatment
• Sexually active patients of reproductive potential who have not agreed to use a highly effective contraceptive method (failure rate of < 1% per year when used consistently and correctly) for the duration of their study drug therapy. Following therapy, patients will be advised to use contraception as per institutional practice or as listed below for investigational agents, whichever is longer
• Men and women of childbearing potential must continue contraception for a period of 6 months after last dose of brentuximab vedotin
• Women of child-bearing potential (WOCBP) must continue contraception for a period of at least 5 months after the last dose of nivolumab
• All patients and/or their parents or legal guardians must sign a written informed consent
• All institutional, Food and Drug Administration (FDA), and National Cancer Institute (NCI) requirements for human studies must be met

1. Participant and/or parent guardian must be able to understand and provide informed consent 2. Children ages 4-12 years of age 3. Cohort 1: Family is self-identified as Plain community member 4. Cohort 2: Madison-area children with parental report of doctor-diagnosed asthma 5. Cohort 3: Madison-area children with no history of asthma by parental report 6. Cohort 4: Madison-area children who have an active respiratory illness 1. Inability or unwillingness of a participant to give written informed consent or comply with study protocol 2. Chronic sinusitis (frequent sinus infections) 3. Plans to move out of the area before completing the study 4. Past or current medical problems or findings from physical examination or laboratory testing that are not listed above, which, in the opinion of the investigator, may pose additional risks from participation in the study, may interfere with the participant's ability to comply with study requirements or that may impact the quality or interpretation of the data obtained from the study 5. Enrolled family member