Pfizer Begins Testing COVID-19 Booster Shot

News4JAX reports that Pfizer has administered its first COVID-19 booster shots, and is currently testing how it works with other common vaccines. The study aims to determine whether another vaccine can be administered along with the COVID-19 booster dose, with participants receiving both the booster shot and a pneumonia vaccine. "To see if they're able to tolerate it, see if that in any way adversely affects their development of antibodies against COVID-19 and see how the immune reaction is . . . the side effect profile of the combination," said Duval County Medical Society Foundation President Sunil Joshi. "And if that looks good, maybe then consider combining it with seasonal flu vaccine as well."