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NPR Coronavirus Updates

AstraZeneca Vaccine Can Prevent COVID-19, Late-Stage Study Says

NPR | By Jaclyn Diaz

Published March 21, 2021 at 10:52 PM MDT

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Results of the trial, which involved more than 32,000 volunteers, showed two doses of the vaccine administered four weeks apart had an efficacy of 79% at preventing symptoms of COVID-19.

NPR Coronavirus Updates

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Jaclyn Diaz

See stories by Jaclyn Diaz