Immunization Side Effects

All vaccines have to be tested to make sure they are both safe and effective. The most common side effects are mild pain, swelling and redness where the shot was given.

Some infant vaccines may cause a low-grade fever (approximately 38°C) or fussiness for a day or two after the injection. Physicians may recommend acetaminophen to prevent fever and pain. Serious side effects from immunizations are rare. Please report any side effects or severe vaccine reactions to your doctor, nurse practitioner or local public health unit. You should always discuss the benefits and risks of any vaccine with your doctor or nurse practitioner.