Pfizer, Merck begin new trials of oral COVID treatment
Pfizer and Merck & Co announced new trials of their experimental oral antiviral treatment for COVID-19. The drug is designed to block the activity of a key enzyme involved in viral replication.
A refrigerated truck leaves the Pfizer plant in Puurs, Belgium December 3, 2020. (photo credit: YVES HERMAN/REUTERS)ByREUTERS
