New AstraZeneca report says vaccine was 76% effective in preventing Covid-19 symptoms
By Maggie Fox Drug giant AstraZeneca updated its data on how well its coronavirus vaccine works, saying late Wednesday the vaccine showed 76% efficacy against symptomatic coronavirus disease and 100% efficacy against severe or critical disease or the need for hospitalization. The vaccine was 85% effective in preventing symptoms in volunteers 65 and older, the company said. The numbers are not terribly different from data the company released in a statement Monday. As with Monday’s data, the company has released them via news release and not in a peer-reviewed report or as a formal submission for US Food and Drug