On Aug. 23, the U.S. Food and Drug Administration (FDA) approved the first COVID-19 vaccine, one made by Pfizer-BioNTech, for anyone 16 years and older. The vaccine requires two doses and according to company studies, is 91% effective in protecting people from COVID-19 disease, including from severe illness. The vaccine received the FDA’s emergency use authorization (EUA) in December, whi…
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