US Centers for Disease Control and Prevention reports lower rate of anaphylaxis after Pfizer/BioNTech Covid-19 vaccine

A total of 50 cases of anaphylaxis were reported in people receiving the Pfizer/BioNTech Covid-19 vaccine up until 18 January 2021 (rate of around 5 per million doses administered; lower than that previously reported); the rate for the Moderna vaccine was 2.8 per million.

Reuters Health