Flu Shot Side Effects
Seasonal flu vaccines have a very good safety track record. Although there are possible side-effects to vaccination, the Centers for Disease Control and Prevention and the Food and Drug Administration closely monitor the safety of seasonal flu vaccines.
Different side effects can be associated with the flu shot. The viruses in the flu shot are killed (inactivated), so you cannot get the flu from a flu shot. Some minor side effects that could occur are:
- Soreness, redness, or swelling where the shot was given
- Fever (low grade)
If these problems occur, they begin soon after the shot and usually last 1 to 2 days. Almost all people who receive influenza vaccine have no serious problems from it. However, on rare occasions, flu vaccination can cause serious problems, such as severe allergic reactions. As of July 1, 2005, people who think that they have been injured by the flu shot can file a claim for compensation from the National Vaccine Injury Compensation Program (VICP)External Web Site Icon.
You cannot get the flu from the flu shot or the nasal spray. The flu shot contains inactivated (killed) flu viruses that cannot cause illness. The nasal spray contains weakened live viruses. The weakened viruses only cause infection in the cooler temperatures found in the nose. The viruses cannot infect the lungs or other areas in the body where warmer temperatures exist.
Serious side effects usually begin within a few minutes to a few hours after receiving the shot. Possible serious side effects of vaccination include:
- Difficulty breathing
- Swelling around the eyes or lips
- Racing heart
- Behavior changes
- High fever
If you experience any of these reactions, seek medical attention immediately.