NCT05384288 · St. Jude Children's Research Hospital
Response to Influenza Vaccination in Pediatric Oncology Patients
What this study is about
Influenza infection occurring during oncologic treatment or following hematopoietic cell transplantation (HCT) is associated with increased risk of morbidity in the form of lower respiratory tract infection (LRTI) and mortality relative to otherwise healthy patients.
View original scientific description
Influenza infection occurring during oncologic treatment or following hematopoietic cell transplantation (HCT) is associated with increased risk of morbidity in the form of lower respiratory tract infection (LRTI) and mortality relative to otherwise healthy patients. The study participants have been diagnosed with a hematological malignancy and are eligible to receive the current seasonal influenza (Flu) vaccine. Primary Objective * To determine the feasibility of opening a longitudinal prospective study of IIV immunogenicity in pediatric leukemia patients. * To describe the immunogenicity, as measured by the development of cell- and/or antibody-mediated influenza specific responses 3 to 5 weeks following vaccination, in a cohort of pediatric leukemia patients. Secondary Objectives * To describe whether an immune response, as measured by development of cell- and/or antibody-mediated influenza specific responses, is detectable 1-2 weeks following vaccination in a cohort of pediatric leukemia patients. * To describe the durability of immunogenicity by measuring cell - and antibody- mediated influenza specific responses at 6 months and 1 year following vaccination in a cohort of pediatric leukemia patients. Exploratory Objectives * To estimate the clinical effectiveness of influenza vaccine in this cohort by monitoring for the development of clinical diagnosis of influenza in the cohort of enrolled pediatric oncology patients. * To correlate results of immune cell frequency in blood, as measured by complete blood count with differential, with development of an immune response to IIV.
Primary outcome measures
Proportion of evaluable participants.
Time frame: 3 years
Feasibility is estimated as the proportion of evaluable patients who provide a baseline and Day +35 sample. A 95% confidence interval will be provided.
Proportion of participants with immunogenicity 3 to 5 weeks following vaccination.
Time frame: 3 years
Immunogenecity will be measured by the development of cell- and antibody-mediated influenza specific responses 3 to 5 weeks following vaccination. Immunogenicity is estimated as the proportion of evaluable patients whose cell- (as measured by development of any detectable specific T cell responses) and antibody-mediated influenza specific responses (as measured by detectable post vaccination antibody titers) 3 to 5 weeks following vaccination. 95% confidence intervals will be provided.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Patient ≤ 18 years old at the time of consent receiving care at St. Jude Children's Research Hospital
- Diagnosed with a hematological malignancy
- Eligible to receive the current seasonal influenza vaccine
Exclusion criteria
- • Previously received at least one dose of the current seasonal influenza vaccine.
Where
- Memphis, Tennessee
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Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jun 12, 2026 · Source of record for eligibility and locations