Officials say there is some concern about the side effects of COVID-19 booster shots.

The FDA's top vaccine official says swollen lymph nodes appear to occur more frequently after a booster.

Officials say it's a common side effect with vaccines and it usually goes away quickly.

However, officials say the swollen lymph nodes could interfere with mammograms. They are telling patients if you're getting a booster and a mammogram around the same time, talk to your doctor.