Pfizer announced Friday that a recent large, late-stage trial found that its COVID-19 antiviral pill, Paxlovid, failed at preventing symptomatic infection of people living with a person who has the disease.
The trial enrolled 2,957 participants aged 18 and older who live in the same household as another person who has COVID-19 with symptoms. They were given either Paxlovid or a placebo twice daily for five or 10 days.
