Pfizer and BioNTech's vaccine against COVID-19, Peter Marks, the director of the FDA's Center for Biologics Evaluation and Research said."It's fair to say that there have been a few allergic reactions reported from different states of the union.
I think that the total that is under investigation is roughly about five," Marks said during a media call late on Friday.The FDA official said that one component of the vaccine, polyethylene glycol, may be the cause of the allergic reactions seen in both the United Kingdom and the United States following the launch of mass inoculation programs.More than a week ago, two medical professionals in the United Kingdom suffered an allergic reaction after receiving the Pfizer-BioNTech vaccine.