COVID mRNA vaccine effectiveness high in those 16 and upThe Pfizer/BioNTech and Moderna mRNA-based COVID-19 vaccines have a collective 91% vaccine efficacy against SARS-CoV-2 infection in Americans 16 years and older, according to a test-negative study published in the Journal of Infectious Diseases today.The researchers looked at 812 people who were seeking outpatient medical care for potential COVID-19 infection.
About 29% (236) tested positive, of whom 8.5% were partially vaccinated and 7.2% were fully vaccinated. Of the remaining people who received negative COVID-19 tests, 29% were partially vaccinated and 71% were fully vaccinated.Vaccine effectiveness was calculated to be 91% for those fully vaccinated and 75% for those who were