The companies said last month that three doses of the shot were 80% effective at preventing symptomatic COVID-19 and generated a robust immune response in children ages 6 months to 5 years old.
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Pfizer Inc. and partner BioNTech SE asked U.S. health regulators to authorize three doses of their vaccine for children under 5 years.
The request Wednesday to the Food and Drug Administration comes after the companies said last month that three doses of the shot were 80% effective at preventing symptomatic COVID-19 and generated a robust immune response in children ages 6 months to 5 years old.
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