Single-dose vials of Pfizer's updated COVID vaccine for adults. On Sept. 11, 2023, U.S. regulators approved updated COVID-19 vaccines from Pfizer and Moderna.WASHINGTON — The U.S. approved updated COVID-19 vaccines Monday, hoping to rev up protection against the latest coronavirus strains and blunt any surge this fall and winter. from Moderna and Pfizer and its partner BioNTech to most Americans even if they’ve never had a coronavirus vaccination.
But protection wanes over time and the coronavirus continually churns out new variants that can dodge prior immunity. It’s been a year since the last time the vaccines were tweaked, and only about 20% of adults ever received that earlier update. Just like earlier vaccinations, the fall round is cleared for adults and children as young as age 6 months. FDA said starting at age 5, most people can get a single dose even if they’ve never had a prior COVID-19 shot. Younger children might need additional doses depending on their history of COVID-19 infections and vaccinations.
And while even the XBB.1.5 variant is no longer dominant, FDA determined that it’s close enough to coronavirus strains causing most COVID-19 illnesses today to offer good cross-protection. Like earlier versions, they're expected to be most protective against COVID-19's worst consequences rather than mild infection.
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