Merck begins late-stage trial of experimental Covid-19 drug

FILE PHOTO: The Merck logo is seen at a gate to the Merck & Co campus in Linden, New Jersey, U.S., July 12, 2018. REUTERS/Brendan McDermid/File Photo
Merck & Co Inc and partner Ridgeback Biotherapeutics said on Wednesday they had begun enrolling patients in a late-stage trial of their experimental drug molnupiravir for prevention of Covid-19 infection.