FDA says Johnson & Johnson’s single-dose shot protects against COVID-19

Johnson & Johnson’s single-dose vaccine offers strong protection against severe COVID-19, according to an analysis by U.S. regulators Wednesday that sets the stage for a final decision on a new and easier-to-use shot to help tame the pandemic. The Food and Drug Administration’s scientists confirmed that overall the vaccine is about 66% effective at preventing moderate to severe COVID-19, and about 85% effective against the most serious illness. The agency also said J&J’s shot — one that could help speed vaccinations by requiring just one dose instead of two — is safe to use.