Reactogenicity refers to reactions that occur soon after vaccination, according to Dr. Marlene Millen, primary care physician and chief medical information officer at UC San Diego Health. She says this reaction is not a side effect of the vaccine. It…

Marlene Millen, MD, primary care physician and chief medical information officer at UC San Diego Health, answers questions about vaccines for COVID-19. She emphasizes that once you get your vaccine, you might transmit the virus to others even if you…