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What are side effects of immunization and vaccines?

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Today, vaccines are considered safe. As with any medication, they can have side effects. In most cases these are usually mild. Most common minor reactions to an immunization are:

Side effects like these usually disappear in a few days. In extremely rare instances a high fever, in excess of 104 F, can occur with a vaccine. Fevers like this will not harm your children, but they can make them uncomfortable and upset.

  • Soreness or redness around the injection site
  • Low-grade fever

From: Immunizations and Vaccines WebMD Medical Reference

SOURCES:  CDC. National Immunization Program, CDC.

Reviewed by Smitha Bhandari on May 20, 2018

SOURCES:  CDC. National Immunization Program, CDC.

Reviewed by Smitha Bhandari on May 20, 2018

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What should I do if my child has allergic reactions to immunizations and vaccines?

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THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

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