Allergic reactions to Pfizer, AstraZeneca COVID-19 vaccines rare, study shows

A 3-month research on vaccine unwanted side effects discovered extreme allergic reactions to the Pfizer-BioNTech and AstraZeneca COVID-19 vaccines have been uncommon, affecting lower than two per cent of individuals, whereas milder reactions similar to tenderness and ache on the website of the injection have been pretty widespread.