Avian Flu Diary: MMWR: Allergic/Anaphylactic Reactions After Receipt of the 1st Dose of Pfizer-BioNTech COVID-19 Vaccine

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. Source: Avian Flu Diary: MMWR: Allergic/Anaphylactic Reactions After Receipt of the 1st Dose of Pfizer-BioNTech COVID-19 Vaccine