This study aimed to find out which of two updated COVID-19 booster vaccines—Novavax or Pfizer's mRNA vaccine—better protects adults from getting sick with COVID-19. It also compared protection in people who got a booster to those who did not. Over 1,100 adults in Utah participate…
Phase: PHASE4 • Sponsor: Sarang K. Yoon, DO, MOH • Aim: Prevention
Last updated Mar 30, 2026 14:29 UTC