Luz Ortega receives a COVID-19 vaccination shot at a vaccination site at Stevenson Family Health Center in the Bronx on February 10, 2021 in New York City. (Photo by Spencer Platt/Getty Images) The U.S.
Food and Drug Administration has authorized Americans who are 50 years and older to receive a second booster of the COVID-19 vaccine from either Pfizer-BioNTech or Moderna.
The authorization makes millions more Americans eligible for a fourth dose. Currently, the U.S. urges two primary shots followed months later by a booster dose for everyone age 12 and older.
The second booster approved Tuesday for those 50 and up should be administered at least four months after the previous booster, the FDA said.