WASHINGTON : Johnson & Johnson's single-dose vaccine offers strong protection against severe COVID-19, according to an analysis released by US regulators that 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 offer the nation a third vaccine option and help speed vaccinations by requiring just one dose instead of two.
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.