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Pfizer plans to test a third dose of its COVID vaccine on infants and young children

A child, with parent in tow, arrives to receive the Pfizer COVID-19 vaccine for children 5 to 11 years old at London Middle School in Wheeling, Ill., last month. (AP)
A child, with parent in tow, arrives to receive the Pfizer COVID-19 vaccine for children 5 to 11 years old at London Middle School in Wheeling, Ill., last month. (AP)

This article was originally published on December 17, 2021.

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