The Food and Drug Administration on Tuesday signed off on a second booster shot for older Americans and people who are immunocompromised.
The second dose of the Pfizer-BioNTech or Moderna booster shots was authorized by the federal agency for people ages 50 and up and those with severely weakened immune systems at least four months following their first booster.
The FDA had previously only cleared the fourth doses of the Pfizer or Moderna vaccines for people ages 12 and older who were immunocompromised. That group can now get a fifth shot — three doses and two boosters — with Tuesday’s FDA authorization.
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