An allergic reaction can be caused by the chemical polyethylene glycol, which is found in both Pfizer and Moderna vaccines.
In the United States, an allergic reaction was detected in five people to the COVID vaccine of Pfizer Inc and BioNTech. This was said by the spokesman for the US Food and Drug Administration (FDA) Peter Marks, on Monday, December 21.
According to him, the chemical substance polyethylene glycol, which is part of both the Pfizer vaccine and the recently approved vaccine of the American company Moderna, can cause an allergic reaction.
The FDA is currently investigating vaccine allergy issues, he said.
Earlier it was reported that in the United States, two medical workers developed an allergic reaction after being vaccinated with Pfizer and BioNTech vaccines. Both cases occurred in Alaska.
The allergic reaction was similar to the one experienced by two health workers after being vaccinated in the UK last week. Allergy sufferers were then advised to avoid the Pfizer vaccine.