A new CDC study adds to the growing body of real-world evidence (outside of a clinical trial setting) showing that COVID-19 mRNA vaccines authorized by the Food and Drug Administration (FDA) protect healthcare personnel (HCP) against COVID-19. mRNA vaccines (Pfizer-BioNTech and Moderna) reduced the risk of getting sick with COVID-19 by 94% among HCP who were fully vaccinated. This assessment, conducted in a different study network with a larger sample size from across a broader geographic area than in the clinical trials, independently confirms US vaccine effectiveness findings among healthcare workers that were first reported March 29.
