via U.S. News & World Report on July 1, 2021
Reports of Some Getting Pfizer, Moderna ‘Boosters’ After J&J Vaccine Prompts Calls for More Guidance
By Chelsea Cirruzzo and Cecelia Smith-Schoenwalder
Jason Gallagher, a clinical professor at Temple University School of Pharmacy, recently received one dose of the Pfizer vaccine after getting the J&J shot in November as part of a clinical trial.