Like any medicine, vaccines can have side effects. Most are minor (for example, a sore arm or mild fever) and go away within a few days. Remember, vaccines are continually monitored for safety and are one of the safest medications available today, as they are given to healthy people. However, a decision not to vaccinate your child involves more risk and could put your child and others who come into contact with him or her at risk of contracting a potentially deadly disease.

See the full list of potential vaccine side effects on the CDC website and talk to your doctor about any questions or concerns about side effects.

Sources:
CDC: Vaccine Side Effects
CDC: Vaccine Safety