FDA Eyes Polyethylene Glycol As Possible Link To Severe Vaccine Allergy

FDA biologics center director Peter Marks revealed that the agency is considering whether polyethylene glycol -- the common ingredient in both Pfizer’s and Moderna’s two-dose mRNA vaccines -- could be causing the allergic reactions to Pfizer’s vaccine that have been reported in the United Kingdom and in the United States. During a Friday (Dec. 18) press briefing, Marks said there are about five cases of allergic reactions to Pfizer’s vaccine that are under investigation in the United States. Three cases...