Fever

• Fever is a known and common side effect of receiving the flu vaccine. If your fever remains high or lasts more than three days, seek medical attention.
  
  

Aching

• Aching muscles and joints are a common side effect after having the flu shot.
  
  

Shot Irritation

• People who have had an influenza immunization have experienced irritation around the injection site, including redness, swelling, and itching.
  
  

Breathing Problems

• If you start to have breathing problems after getting the flu shot, such as wheezing or shortness of breath, seek medical attention right away.
  
  

Vomiting

• People who have received the influenza vaccine have reported feeling nauseous and vomiting.