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Last Updated:

Feb 6, 2023, 4:00 PM EDT


Pfizer COVID-19 vaccine less effective in ages 5-11: study

Two doses of the Pfizer Inc. and BioNTech SE COVID-19 vaccine was protective against severe disease in children aged 5 to 11 during the recent omicron variant surge, but quickly lost most of its ability to prevent infection in the age group, according to a study by New York State researchers.