The Covid 19 Vaccines are immune responses vaccines, so after vaccination, it's normal that you have some arm soreness or some fatigue or some body aches or even some fever," Patricia Stinchfield of Children's Hospitals and Clinics of Minnesota, told the meeting of the CDC's Advisory Committee on Immunization Practices. Providers must be ready to explain this to people who line up to get any COVID-19 vaccine.
This summer, computational biologist Luke Hutchison volunteered for a trial of Moderna's COVID-19 vaccine. But after the second injection, his arm swelled up to the size of a “goose egg,” Hutchison says. He can't be sure he got the vaccine and not a placebo, but within a few hours, Hutchison, who was healthy and 43, was beset by bone and muscle aches and a 38.9°C fever. “I started shaking. I had cold and hot rashes,” he says.
Hutchison's symptoms resolved after 12 hours.