EXPLAINER: What do we know about booster shots for COVID-19?

EXPLAINER: What do we know about booster shots for COVID-19?

August 20, 2021 09:33 am

U.S. health officials plan to offer COVID-19 booster shots to vaccinated Americans to shore up their protection amid the surging delta variant and evidence that the vaccines’ effectiveness is declining. A look at what we know about boosters and how they could help fight the coronavirus pandemic:

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