Certain groups are now eligible for another dose of the bivalent COVID-19 vaccine, and the updated shots have now fully replaced the monovalent shots, the FDA announcedopens in a new tab or window.

The agency scrapped the emergency use authorizations (EUAs) for the monovalent Moderna and Pfizer-BioNTech mRNA vaccines, and has authorized the bivalent boosters (original plus Omicron BA.4/BA.5 strains) for all doses starting at age 6 months.

People age 65 and up can now get a second bivalent dose at least 4 months after their initial bivalent dose. FDA said a second bivalent dose for this group is supported by data showing that immunity wanes in this population over time, but that an additional dose restores it.

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