Why are there side effects when you get a vaccine?
Published: April 14, 2021
Total Running Time: 00:04:15
Vaccines train the immune system to fight off viruses—but sometimes, the training process comes with a few side effects. Find out why you might have a sore arm or a low fever after you get a vaccine (and why that’s OK).
For up-to-date information on COVID and vaccines, visit CDC.gov.