Influenza Vaccine
What is it? Overview Usage Side Effects and Warnings

What is Influenza Vaccine?

For the latest information on influenza vaccination, visit the Centers for Disease Control and Prevention website at

What Are the Risks Associated With the Influenza Vaccine?

Almost all people who receive the influenza vaccine have no problems. There are certain risks associated with the vaccine. As with any vaccine, there is a small risk of serious problems, including severe allergic reaction.

Adverse effects associated with the flu shot include:

  • Soreness, redness, and swelling around the injection site
  • Low-grade fever
  • Muscle aches
  • Adverse effects associated with the nasal spray vaccine include:
  • Runny nose
  • Headache
  • Vomiting
  • Muscle aches
  • Fever
  • Sore throat
  • Cough

Who Should Not Get Vaccinated?

Certain people should consult their doctor before receiving the influenza vaccine. These include:

  • People who have a severe allergy to chicken eggs
  • People who...