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AstraZeneca vaccine safe, 79% effective in late-stage US trials

22 Mar 2021

AstraZeneca’s Covid-19 vaccine, which is being used in Sri Lanka as well, was shown to be safe and 79% effective in preventing symptomatic disease in widely anticipated US clinical trials, the Wall Street Journal reported today. It said these results would provide a vote of confidence for the shot and a pathway for its authorization in the US The interim trial data showed the vaccine, developed in partnership with the University of Oxford, was 80% effective in participants aged 65 and over, a group previous AstraZeneca trials lacked in large numbers.


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