Two doses of the Pfizer Inc and BioNTech SE COVID\u002D19 vaccine was protective against severe disease in children aged 5 to 11 during the recent Omicron variant…
The vaccine’s efficacy against infection among those children declined to 12% at the end of January from 68% in mid-December compared to kids who did not get vaccinated, according the study https://www.medrxiv.org/content/10.1101/2022.02.25.22271454v1, which has not yet been peer reviewed.
“These results highlight the potential need to study alternative vaccine dosing for children and the continued importance layered protections, including mask wearing, to prevent infection and transmission,” the researchers said. Dr. Paul Offit, a pediatric infectious disease expert at Children’s Hospital of Philadelphia, questioned whether the data were robust enough to say that the vaccine’s efficacy had significantly declined, particularly against severe disease.
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