AstraZeneca Vaccine Is Effective Against COVID-19, Phase III Study Says
by Jaclyn Diaz
Mar 22, 2021
1 minute
Preliminary results from a study examining the efficacy of the Oxford-AstraZeneca coronavirus vaccine indicate it is significantly effective at preventing severe illness from COVID-19.
Results of the trial, which involved more than 32,000 Monday. It had an efficacy of 100% at preventing severe disease and hospitalization.
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