Most children who receive vaccines experience no reactions at all, or very mild reactions such as fever or soreness at the site of injection. Very rarely, allergic or more severe reactions may occur, but statistically, being vaccinated is still far safer than contracting the diseases that the vaccines prevent.
Your child should not receive a vaccine if he/she:
• Is ill with a fever greater than 100 degrees within 24 hours of the visit.
• Has a documented allergy to a vaccine component (for example, eggs with the MMR vaccine).
• Has experienced a severe reaction to a past vaccine of that same type, for example:
– inconsolable crying for 3 hours or more
– a fever of 105 degrees or more
– limp, pale, and/or dusky spells
– an unusual high-pitched cry with lethargy
If your child experiences a severe reaction or if you have concerns about his reaction to a vaccine, notify your health-care provider.
Rarely, a child may experience a serious anaphylactic, allergic reaction to a vaccine. Symptoms of allergic reactions include wheezing, hoarseness, and difficulty breathing. Should these symptoms develop, seek immediate medical attention or call 911.