Only about 6% of youngsters ages 6 months through 4 years had gotten at least one dose of a COVID-19 vaccine.
authorized tot-sized vaccine doses made by Pfizer and its partner BioNTech based on a study showing they were safe and produced high levels of virus-fighting antibodies. But there was only preliminary data on how that translated into effectiveness against symptomatic COVID-19.
The new update analyzed COVID-19 diagnoses between March and June in Pfizer's ongoing study of the three-dose vaccine. There were 21 COVID-19 cases among the 351 tots who got dummy shots -- compared to just 13 among the 794 youngsters given three vaccine doses. The child cases primarily were caused by the BA.2 omicron version that was circulating at the time. Today, another omicron relative, BA.5, is causing most COVID-19 cases in the U.S. and much of the world.In older children and adults, the COVID-19 vaccines have been used long enough to prove that they remain strongly protective against severe disease and death even as the coronavirus mutates -- while early protection against infection wanes.
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