Health COVID-19 Updates: Study Looks at the Effectiveness of J&J Vaccine Against the Delta Variant Posted onJuly 22, 2021July 22, 2021Authorlutra Share on PinterestNoam Galai/Getty Images More than 4 million people have died globally 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