The U.S. Food and Drug Administration (FDA) has authorized a single booster dose of the Pfizer-BioNTech COVID-19 vaccine bivalent for children six months old through four years of age. At least two ...

Pfizer said Friday it was changing plans and testing three doses of its COVID-19 vaccine in babies and preschoolers after the usual two shots didn't appear strong enough for some of the children.

Vaccine maker Pfizer said Friday that trials of its vaccine in children ages 2 to 5 show that it did not provide the expected immunity in kids this age, and it is adding a third dose to the regimen.

PHILADELPHIA (WPVI) -- An estimated 28 million children across the U.S. would be eligible for COVID-19 vaccine shots if regulators give the green light, but it's a process that could take weeks.

(AP) - Pfizer said Friday it was changing plans and testing three doses of its COVID-19 vaccine in babies and preschoolers instead of the usual two. The addition of an extra dose came after a ...

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The children's parents discussed their decision with ABC News. Three American siblings have received their first dose of the Pfizer-BioNTech COVID-19 vaccine as part of global clinical trials for ...

The COVID vaccine could be coming soon to an elementary school near you. Drugmaker Pfizer said its vaccine against COVID-19 is safe and effective for children ages 5 to 11, a key step toward winning ...