Johnson & Johnson's single-dose vaccine offers strong protection against severe Covid-19, according to an analysis released by US regulators.
The analysis sets the stage for a final decision on a new and easier-to-use shot to help tame the pandemic. The long-anticipated shot could help speed vaccinations by requiring just one dose instead of two.
US Food and Drug Administration scientists on Wednesday 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 is safe.