Allergic reactions including anaphylaxis after receipt of the first dose of Pfizer-BioNTech COVID-19 vaccine – United States, December 14-23, 2020

During 14–23 Dec 2020, there were 21 reports of anaphylaxis after administration of 1,893,360 first doses of the Pfizer-BioNTech COVID-19 vaccine (11.1 cases per million doses) made to the Vaccine Adverse Event Reporting System; 71% occurred within 15 minutes of vaccination.

Source:

Morbidity and Mortality Weekly Report