US Begins Study On Allergic Reaction Risk In Moderna, Pfizer Vaccines

Several allergic reaction incidents, including serious episodes, known as anaphylaxis, have been reported in the US after vaccinations of Pfizer/BioNTech and Moderna shots.

The US National Institutes of Health said on Wednesday it had begun a mid-stage study to determine the risk of allergic reactions to COVID-19 vaccines made by Moderna Inc and Pfizer Inc. Several allergic reaction incidents, including serious episodes, known as anaphylaxis, have been reported in the US after vaccinations of Pfizer/BioNTech and Moderna shots. In January, the US Centers for Disease Control and Prevention said allergic reactions are occurring at a rate of 11.1 per 1 million vaccinations. The study, funded by the National Institute of Allergy and Infectious Diseases, will enroll 3,400 adults between the ages of 18 to 69, with about 60% participants having a history of severe allergic reactions to food, insect stings or immunotherapy.