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The Food and Drug Administration (FDA) has approved the use of Pfizer’s Covid omicron booster as a fourth dose for children under 5 years of age.

An employee draws a syringe with Comirnaty vaccine from Biontech and Pfizer adapted to the Omicron-BA.1 variant at the Mainz vaccination center. Sebastian Christoph Gallnow dpa | Photo Alliance | Getty Images The U.S. Food and Drug Administration on Tuesday authorized pfizer Omicron booster for children under the age of five who have previously received

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