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Coronavirus Update: AstraZeneca vaccine shows 74% efficacy in large U.S.-backed trial, and BioNTech co-founder says COVID will become manageable

The COVID-19 vaccine developed by AstraZeneca PLC and Oxford University showed 74% efficacy at preventing symptomatic illness in a large, late-stage trial conducted in the U.S., Chile and Peru, according to data published in the New England Journal Of Medicine on Thursday.