Pfizer: Protection against Omicron improves after 3 doses
CNN, 08 Dec 2021
CNN's Dr. Sanjay Gupta speaks with Pfizer's Chief Scientific Officer Mikael Dolsten about preliminary lab studies that show a booster of the Pfizer/BioNTech vaccine is needed to neutralize the Omicron variant and that first two doses may not provide sufficient protection. #CNN #News