CDC: allergic reactions including anaphylaxis after receipt of the first dose of Pfizer BioNTech COVID-19 vaccine

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During December 14–23, 2020, monitoring by the Vaccine Adverse Event Reporting System detected 21 cases of anaphylaxis after administration of a reported 1,893,360 first doses of the Pfizer-BioNTech COVID-19 vaccine (11.1 cases per million doses); 71% of these occurred within 15 minutes of vaccination


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** This post was originally published on January 8, 2021 **