The Centers for Disease Control and Prevention recently updated its guidance on face masks for preventing the spread of COVID-19. An infectious disease doctor explains what you need to know.
Irfan Hafiz
Pfizer Inc. said Friday that its experimental antiviral pill for COVID-19 cut rates of hospitalization and death by nearly 90% in high-risk adults, as the drugmaker joined the race for an easy-to-use medication to treat the coronavirus.