US FDA authorizes second Omicron-updated COVID booster for older adults

The U.S. Food and Drug Administration on Tuesday authorized a second dose of Omicron-targeting COVID-19 vaccines for older adults as well as those with a weak immune system.

The agency also said the updated shots from Pfizer (PFE.N)-BioNTech (22UAy.DE) and Moderna (MRNA.O) would become the new primary COVID vaccine, and withdrew its emergency-use authorization for the older messenger RNA vaccines that target only the original version of coronavirus.