U.S. regulators OK updated COVID booster shots targeting Omicron

U.S. drug regulators on Wednesday approved two updated formulations of COVID-19 vaccines as booster shots intended to provide increased protection against the currently circulating Omicron variant.The newly authorized single-dose shots will be for use at least two months after administration of the existing primary or booster vaccine. The updated booster from Pfizer Inc. will be available for those 12 years of age and older, while the new shot from Moderna Inc. is authorized for those at least 18 years old.The so-called bivalent vaccines are meant to work against both the original strain of…READ FULL ARTICLE