A Randomized, Observer-Blind, Active-Controlled Phase 3 Study to Investigate the Safety, Immunogenicity, and Relative Vaccine Efficacy of mRNA-1283 Compared With mRNA-1273 in Participants Aged ≥12 Years for the Prevention of COVID-19
A Randomized, Observer-Blind, Active-Controlled Phase 3 Study to Investigate the Safety, Immunogenicity, and Relative Vaccine Efficacy of mRNA-1283 Compared With mRNA-1273 in Participants Aged ≥12 Years for the Prevention of COVID-19
The purpose of this study (Part 1 and Part 2) is to evaluate the relative vaccine efficacy (rVE), safety, reactogenicity, and immunogenicity of mRNA-1283.222 versus mRNA-1273.222 (Part 1) and mRNA-1283.815 versus mRNA-1273.815 (Part 2).
Key Inclusion Criteria:
Part 2: No prior vaccination is required. For participants who have been previously vaccinated, proof of vaccination is required.
Key Exclusion Criteria:
Note: Other inclusion and exclusion criteria may apply.
Jacksonville, Florida 32216, United States
Nottingham, United Kingdom
Runcorn, United Kingdom