Posted in Web CDC: Severe allergic reactions to Pfizer COVID-19 vaccine … September 28, 2021 Pfizer-BioNTech’s COVID-19 vaccine was the first to receive emergency use authorization from U.S. regulators, and the first doses went into the arms of front-line healthcare workers Dec. 14. The … https://www.latimes.com/science/story/2021-01-06/severe-allergic-reactions-to-pfizers-covid-19-vaccine-are-rare-cdc-says