FILE - A nurse gives a dose of the Moderna vaccine against COVID-19 to a man at a vaccination center on Aug. 11, 2021, in Medellin, Colombia. (Photo by JOAQUIN SARMIENTO/AFP via Getty Images) The findings offer "yet more evidence" that many transplant recipients could benefit from an extra dose, said Dr.
Dorry Segev, a Johns Hopkins University transplant surgeon who wasn’t involved with the new research. AdvertisementBut it's important to check patients' antibody levels before offering another shot, as some study participants had pretty good immune responses to regular vaccination, added Segev, who is leading a U.S.