$PFE New study shows Pfizer COVID-19 vaccine is 94% effective in preventing asymptomatic infection https://www.firstcoastnews.com/amp/article/news/health/coronavirus/new-study-shows-pfizer-covid-19-vaccine-is-94-percent-effective-in-preventing-asymptomatic-infection/77-5df72296-e47b-496f-88c9-8b3c1e7b0ab4