KEY POINTS
  • More than 47 million Pfizer vaccine recipients who received both shots at least six months ago became eligible for a booster Friday.
  • More than 39.1 million Moderna vaccine recipients who received both shots at least six months ago became eligible for a booster Friday.
  • The CDC adopted a slightly different criteria for J&J's one-shot Covid vaccine, making almost 13 million recipients immediately eligible.
A patient receives their coronavirus disease (COVID-19) vaccine booster during a Pfizer-BioNTech vaccination clinic in Southfield, Michigan, U.S., September 29, 2021.

Nearly 100 million people nationwide are immediately eligible to receive Covid booster shots after the Centers for Disease Control and Prevention authorized extra doses of Moderna and Johnson & Johnson's vaccines Thursday night.

The agency's decision also enables fully immunized people to pair their boosters with doses from different manufacturers after research from the National Institutes of Health showed it was safe and effective to mix and match vaccines. Pfizer and BioNTech's boosters were widely cleared for use in the U.S. on Sept. 24.