Pfizer begins large trial to test anti-COVID-19 pill

Pfizer on Monday announced the launch of a large trial to test its investigational oral antiviral drug to prevent COVID-19 infection. The trial will give participants the treatment, PF-07321332, paired with another medication to see if it prevents COVID-19 infection. The mid-to-late-stage study aims to enroll up to 2,660 healthy ...

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