What To Know About Allergic Reactions to the Vaccine: QuickTake

Like all new drugs, the Covid-19 vaccines that have been authorized in Western countries come with some safety concerns and side effects. Many people who’ve received the first two shots deployed, one from Pfizer Inc. and BioNTech SE and another from Moderna Inc., have experienced fever, headache and pain at the site of the injection. These side effects generally disappear quickly. As many as 10 people have had a serious allergic reaction, called anaphylaxis, to the vaccines.

1. What is anaphylaxis?

The body fights foreign invaders through a variety of mechanisms that include making protective proteins called antibodies, releasing ...