COVID-19 shots might be tweaked if variants get worse
The makers of COVID-19 vaccines are figuring out how to tweak their recipes against worrisome virus mutations—and regulators are looking
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The makers of COVID-19 vaccines are figuring out how to tweak their recipes against worrisome virus mutations—and regulators are looking
Read moreOver a month into a massive vaccination program, most older Americans report they don’t know where or when they can
Read moreEvery year, tens of millions of Americans avoid the flu vaccine. During the 2019-2020 flu season, fewer than half of
Read moreModerna Inc. said it would ask U.S. and European regulators Monday to allow emergency use of its COVID-19 vaccine as
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