widespread use in the U.S. and many Western countries, made by Pfizer Inc. and Germany’s BioNTech, and a second option expected soon from competitor Moderna Inc.
both are made the same way. The Food and Drug Administration says huge studies of each have uncovered no major safety risks.
But the allergy concern “points out again the importance of real-time safety monitoring,” said Dr. Jesse Goodman of Georgetown University, a former FDA vaccine chief.
And authorities have multiple ways of tracking how people fare as these COVID-19 vaccines, and hopefully additional ones in coming months, get into more arms.