Can a flu shot cause diarrhea as a side effect?

You should not receive a booster vaccine if you had a life-threatening allergic reaction after the first shot. Keep track of any and all side effects you have after receiving this vaccine. read more

More serious problems following a flu shot can include the following: There may be a small increased risk of Guillain-Barré Syndrome (GBS) after inactivated flu vaccine. This risk has been estimated at 1 or 2 additional cases per million people vaccinated. read more

Flu shot: The flu shot has inactivated virus- so it will not infect you with the flu. If you have reactions to the shot they usually resolve within one to two days. Side effects can include a low grade fever, aches & pain, and localized swelling, redness and pain at the shot site. read more

Remember, vaccines are continually monitored for safety, and like any medication, vaccines can cause side effects. However, a decision not to immunize a child also involves risk and could put the child and others who come into contact with him or her at risk of contracting a potentially deadly disease. read more