Flu Shot Reactions / Flu Shot Reaction
No vaccine is completely safe. Side effects from the flu shot can and do occur, even though they are considered rare. These reactions and flu shot side effects can include local flu shot reactions, such as soreness, pain, and swelling where the flu shot was given, but which are usually mild and last for less than 2 days. They can also include systemic flu shot reactions, which usually begin 6 to 12 hours after getting the flu shot, last for only 1 or 2 days, and can include fever, rash, malaise (not feeling good), and muscle aches. They can include allergic reactions to the flu shot, including hives, angioedema, and anaphylaxis, which can be life-threatening and can triggered by residual egg proteins in people allergic to eggs or to other components of the flu shot. Keep in mind that there are protocols that allow people with egg allergies to get flu shots, so talk to your doctor or allergist if your child is at high risk for complications from the flu and also has an egg allergy. More serious side effects from the flu shot can include flu shot reactions such as seizures, paralysis, and peripheral nerve damage called Guillain Barre Syndrome, or GBS.