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A Study to Evaluate the Efficacy and Safety of mRNA-1283 and mRNA-1273 in Participants 50 to 64 Years of Age Without High-Risk Conditions for Severe Coronavirus Disease 2019 (COVID-19)

StatusActive, Not Recruiting
PhasePhase 4
Started
View on ClinicalTrials.gov ↗
Trial flagged as At Risk
Primary endpoint reworded 2 of 4 changed
See other at-risk trials from Moderna

Record History

See every version on ClinicalTrials.gov ↗

  1. Primary endpoint(s) modified
    • Eligibility criteria expanded, about 10 words
    • Site details revised at 19 of 150 sites
  2. Trial status changed: Recruiting → Active, Not Recruiting
    • Site details revised at 150 of 150 sites
    v6
  3. Site details revised at 1 of 150 sitesv5
  4. Site details revised at 2 of 150 sitesv4
  5. Site details revised at 139 of 150 sitesv3
  6. Trial status: Not Yet Recruiting to Recruiting
    • Start date changed from estimate of Nov 28, 2025 to Nov 26, 2025
    • Site details revised at 150 of 150 sites
    v2
  7. 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  • Stopped: an ongoing trial was terminated, suspended or withdrawn.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.
Moderna
49 trials monitored
See 3 trials at risk
The purpose of this study is to evaluate the efficacy and safety of mRNA-1283 and mRNA-1273 (variant formulations) in adults 50 to 64 years of age without high risk factors for severe COVID-19.
Trial Details
NCT Number NCT07266558
Lead Sponsor ModernaTX, Inc.
Conditions
(from sponsor)		 SARS-CoV-2
Related terms Coronavirus Infections, COVID-19
Enrollment 30,000 participants
Start Date
Primary Completion (estimated)
Study Completion (estimated)
Updated on ClinicalTrials.gov