The FDA authorized booster doses for Americans who are 65 and older, younger adults with underlying health conditions and those in jobs that put them at high risk for COVID-19.
International

U.S. FDA backs Pfizer COVID-19 boosters for senior citizens, high-risk

AP
For elementary school-aged kids, Pfizer tested a much lower dose — a third of the amount that’s in each shot given now. File.
International

Pfizer says COVID-19 vaccine works in kids ages 5 to 11

AP
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