Research Letter
March 8, 2021
Kimberly G. Blumenthal, MD, MSc1; Lacey B. Robinson, MD, MPH1; Carlos A. Camargo Jr, MD, DrPH2; et al
– 64900 employees vaccinated with first dose of covid-19 mRNA vaccine.
– 16 cases of anaphylaxis. All treated and all recovered.
– avg time of onset of anaphylaxis 17 minutes.
– Rate of anaphylaxis = 13 / 64,900 = 0.00025 x 100 = 0.025%