New research from the Penn Institute of Immunology suggests vaccine side effects such as a sore arm, fever or muscle aches are a sign of a positive immune response and should not be a cause for concern.
“Everyone has good responses to the vaccines. They work to protect people against COVID-19. But for those who may be worried about side effects, they are not necessarily a bad thing—they may actually be an indicator of an even better immune response,” said E. John Wherry, director of the Penn Institute of Immunology in the Perelman School of Medicine at the University of Pennsylvania and senior author of the report, in a press release about the report.
