What are the possible side effects from the influenza vaccine?
• Most people experience no side effects from the flu vaccine. Serious reactions to the flu vaccine are rare. • The flu vaccine may cause mild side effects including soreness, redness, or swelling at the site where the flu shot was given. Some people may develop fever or muscle aches shortly after receiving the flu shot; these symptoms can last about 1 or 2 days. Acetaminophen may help with a sore arm or fever. • You can not catch the flu from the flu shot.