This Jan. 24, 2021, file photo shows a vial of the Pfizer vaccine for COVID-19 in Seattle. U.S. regulators on Monday, May 10, 2021, expanded use of Pfizer's shot to those as young as 12, sparking a race to protect middle and high school students before they head back to class in the fall.
May 10, 2021
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May 10, 2021 4 p.m.
Pfizer COVID-19 shot expanded to US children as young as 12
U.S. regulators on Monday expanded the use of Pfizer's COVID-19 vaccine