Pfizer says it is now 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.
December 17, 2021 GMT
An eight-year-old child receives a second dose of the Pfizer COVID-19 vaccine at Northwest Community Church in Chicago, Saturday, Dec. 11, 2021. Pfizer is adding an extra dose of its COVID-19 vaccine for babies and preschoolers enrolled in a study of the shots. Pfizer and its partner BioNTech announced, Friday, Dec. 17, they were adding a third dose to the study after a preliminary analysis found 2- to 4-year-olds didn't have as strong an immune response as expected.
Pfizer announced the change after a preliminary analysis found 2- to 4-year-olds didn’t have as strong an immune response as expected to the very low-dose shots the company is testing in the youngest children. Pfizer and its partner BioNTech said if the three-dose study is successful, they plan to apply for emergency authorization sometime in the first half of 2022.
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