The FDA was also expected to authorize an antiviral pill from Merck, but as of Wednesday afternoon, only Pfizer's had been authorized for use.
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The FDA was also expected to authorize an antiviral pill from Merck, but as of Wednesday afternoon, only Pfizer's had been authorized for use.
As Omicron soars, President Joe Biden offered reassurance to Americans who have followed gotten vaccinated and boosted, and delivered a stark warning to those who haven’t.
Until now, two types of daily pills (Truvada and Descovy) were the only options for what's called pre-exposure prophylaxis (PrEP).