Health COVID-19 Updates: Vaccine Effectiveness Has Declined Amid Delta Spread Posted onAugust 26, 2021August 26, 2021Authorlutra Share on PinterestBrandon Bell/Getty Images More than 4.4 million people globally have died from COVID-19. More than half of U.S. adults are now fully vaccinated. New COVID-19 cases are on the rise in virtually every U.S. state. Source: healthline