KENILWORTH, N.J. & MIAMI--November 4, 2021 Merck (NYSE: MRK), known as MSD outside the United States and Canada, and Ridgeback Biotherapeutics today announced that the United Kingdom Medicines and Healthcare products Regulatory Agency (MHRA) has granted authorization in the United Kingdom (U.K.) for molnupiravir (MK-4482, EIDD-2801), the first oral antiviral…