This study tested how well two different 2023-2024 updated COVID-19 vaccines (Novavax and Pfizer mRNA) protect adults from getting sick with COVID-19. About 1,200 adults who had already received at least two mRNA vaccine doses were randomly assigned to get either the Novavax or P…
Phase: PHASE4 • Sponsor: Sarang K. Yoon, DO, MOH • Aim: Prevention
Last updated Jun 27, 2026 09:00 UTC