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

StatusActive, Not Recruiting
PhasePhase 4
Started
View on ClinicalTrials.gov ↗

Record History

  1. Trial status: Recruiting to Active, Not Recruiting Primary completion date changed from estimate of May 2026 to May 11, 2026 · Completion date: May 2026 to May 2027 · Site details revisedv8 Show 3 more changesShow less
    • Primary completion date changed from estimate of May 2026 to May 11, 2026
    • Completion date: May 2026 to May 2027
    • Site details revised
  2. Re-verified, no change to tracked fieldsv7
  3. Primary and study completion dates: May 2025 to May 2026v6
  4. Primary completion date: May 2024 to May 2025v5
  5. Primary completion date: May 2023 to May 2024 Completion date: May 2024 to May 2025v4 Show 1 more changeShow less
    • Completion date: May 2024 to May 2025
Show 2 earlier versionsHide 2 earlier versions
  1. Primary completion date: May 2022 to May 2023 Completion date: May 2023 to May 2024v3 Show 1 more changeShow less
    • Completion date: May 2023 to May 2024
  2. Trial status: Not Yet Recruiting to Recruiting Start date changed from estimate of Aug 2020 to Apr 1, 2021 · Site details revisedv2 Show 2 more changesShow less
    • Start date changed from estimate of Aug 2020 to Apr 1, 2021
    • Site details revised
  1. Study First Submitted
  • Stopped: an ongoing trial was terminated, suspended or withdrawn.
  • Notable: the trial’s plan changed such as a big move in its timeline or size, a new primary endpoint, sponsor or phase, or recruiting opened or resumed.
  • Minor: routine progress and housekeeping, such as sites added or enrollment closed.
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.
Trial Details
NCT Number NCT04101838
Lead Sponsor University of Alabama at Birmingham
Conditions Influenza
Enrollment 50 participants
Start Date
Primary Completion (estimated)
Study Completion (estimated)
Updated on ClinicalTrials.gov