COVID-19 vaccine from AstraZeneca-Oxford slightly less effective than first touted: 76% rather than 79% against disease, updated data shows

COVID-19 vaccine from AstraZeneca-Oxford slightly less effective than first touted: 76% rather than 79% against disease, updated data shows

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More recent clinical trial results show AstraZeneca's COVID-19 vaccine is slightly less effective in stopping disease than the company...

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