You can experience low-grade fever and aching after getting any flu vaccine. After getting a flu shot some people can also experience soreness, redness, or swelling where the shot was given.
Serious side effects from the flu vaccine are very rare. If they do occur, it’s within a few minutes to a few hours after getting the shot.
It is important to note that the benefits of getting a flu shot far outweigh the risk of flu shot side effects.
See your doctor or nurse if you: Have severe belly pain Cannot eat or drink Vomit blood or have blood in your bowel movements Have a fever higher than 100.4°F (38°C)