Clinical Trial

B Cell and Antibody Response to Seasonal Influenza Vaccines in Younger and Older Adults

Active, Not Recruiting Phase 4
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Summary
This study will examine how various FDA-approved seasonal influenza vaccine types, used in a manner consistent with their approved use, impact the characteristics of influenza specific antibodies in humans, and how these responses differ based on age and prior immunization history.
Protocol Amendment History 7 amendments
This ClinicalTrials.gov record has been amended 7 times since 2019-09-22; most recent amendment 2026-05-11.
Status change: Recruiting → Active, Not Recruiting 2026-05-11
Status change: Not Yet Recruiting → Recruiting 2021-06-01
Trial Details
NCT Number NCT04101838
Lead Sponsor University of Alabama at Birmingham
Conditions Influenza
Enrollment 50 participants
Start Date 2021-04-01
Primary Completion 2026-05-11 (estimated)
Study Completion 2027-05 (estimated)
Updated on ClinicalTrials.gov 2026-05-14