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A Clinical Study to Evaluate the Safety, Tolerability, and Immunogenicity of VAX-31 With Influenza Vaccine in Adults ≥ 50 Years of Age

StatusActive, Not Recruiting
PhasePhase 3
Started
View on ClinicalTrials.gov ↗

Record History

  1. 2 versions Re-verified since May 12, 2026, no change to tracked fieldsv4-v5
  2. Trial status changed: Recruiting → Active, Not Recruiting
    • Enrollment target: estimated 1300 to confirmed 1390
    • Site details revised at 25 of 25 sites
    v3
  3. Site details revised at 1 of 25 sitesv2
  4. 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  • Stopped: an ongoing trial was terminated, suspended or withdrawn.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 is a Phase 3, randomized, double-blind study to evaluate the safety and immunogenicity of VAX-31 and seasonal influenza vaccine in pneumococcal-naïve adults ≥ 50 years when the two vaccines are administered at the same visit or separately.
Trial Details
NCT Number NCT07365826
Lead Sponsor Vaxcyte, Inc.
Conditions
(from sponsor)		 Pneumococcal Vaccines
Related terms Pneumococcal Infections, Pneumonia
Enrollment 1,390 participants
Start Date
Primary Completion (estimated)
Study Completion (estimated)
Updated on ClinicalTrials.gov