FDA Investigating Five Allergic Reactions After Pfizer Shot in US

A syringe is filled from a vial of the Pfizer-BioNTech COVID-19 vaccine as it is prepared to be administered to front-line health care workers under an emergency use authorization at a drive up vaccination site from Renown Health in Reno, Nev. on Dec. 17, 2020. Patrick T. Fallon/AFP via Getty Images

NEW YORK—The U.S. Food and Drug Administration is investigating around five allergic reactions that happened after people were administered Pfizer Inc and BioNTech SE’s COVID-19 vaccine in the United States this week, a top FDA official said late on Friday.

Dr. Peter Marks, director of the FDA’s Center for Biologics Evaluation and Research, said at a press conference that the allergic reactions had been reported in more than one state, including in Alaska.