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Children's Vaccines Health Center

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Immunizations - When to Call a Doctor

Call 911 or other emergency services if you or your child develops any of the following symptoms:

  • An allergic reaction, such as difficulty breathing, wheezing, hives, hoarseness, paleness, weakness, a fast heart rate, or dizziness.
  • Behavior changes, such as passing out (losing consciousness), acting confused, being very sleepy or hard to wake up, or not responding to being touched or talked to.
  • A seizure.

Call your doctor if:

Recommended Related to Children's Vaccines

Measles, Mumps, and Rubella (MMR) Vaccine

The measles, mumps, and rubella (MMR) vaccine is one of the recommended childhood vaccinations. The three-in-one vaccine protects against three potentially serious illnesses. In most states, proof of the MMR vaccine is required for children to enter school. But if you are an adult who has not had the vaccination or the diseases, it may be important for you to receive the MMR shot, too.

Read the Measles, Mumps, and Rubella (MMR) Vaccine article > >

  • Redness and swelling at the site of the shot (injection) last longer than 48 hours.
  • Your child is 3 months of age or younger and has a fever of 100.4 °F (38 °C) or higher.
  • A fever lasts longer than 48 hours after receiving a shot.
  • Any unusual reaction occurs.

If a fever develops after an immunization and you need to find out if you should call your doctor, see:

Talk with your doctor about whether you need special immunizations because you:

  • Are in close contact with people who have an infectious disease.
  • Have planned international travel, especially to developing countries.
  • Live with or visit a pregnant woman or baby.
  • Live with someone who has an impaired immune system.
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WebMD Medical Reference from Healthwise

Last Updated: March 12, 2014
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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