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Pfizer Tests Extra COVID Shot For Kids Under 5 In Setback

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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. (AP Photo/Nam Y. Huh)

Pfizer is testing an extra dose of its COVID-19 vaccine for babies and preschoolers after preliminary research hinted the usual two doses wouldn’t be enough.

Pfizer had been testing very low-dose shots in children under age 5, with some data expected by year’s end. But Pfizer and its partner BioNTech announced Friday the change to its ongoing study after a preliminary analysis found 2- to 4-year-olds didn’t have as strong an immune response as expected — although babies and toddlers reacted well.

It’s not clear how much the setback will delay the quest for vaccinating the youngest children.

 

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