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Are there any risks associated with the chickenpox vaccine?

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The most common side effect from the chickenpox vaccine is swelling, soreness, or redness at the site of the injection. A small number of people may also develop a mild rash or a low-grade fever after vaccination. Serious reactions to the chickenpox vaccine are extremely rare, but they may include:

  • Seizures
  • Brain infection
  • Pneumonia
  • Loss of balance
  • Severe allergic reaction (anaphylaxis)

SOURCES: CDC: "Varicella (Chickenpox) Vaccine Q&A," "Varicella (Chickenpox) Vaccination." Medline Plus: "Chickenpox." Merck Manuals: "Chickenpox." AdultVaccination.org: "Chickenpox (Varicella)." Immunization Action Coalition: "Chickenpox (Varicella) Vaccine Questions and Answers."




Reviewed by Minesh Khatri on April 30, 2017

SOURCES: CDC: "Varicella (Chickenpox) Vaccine Q&A," "Varicella (Chickenpox) Vaccination." Medline Plus: "Chickenpox." Merck Manuals: "Chickenpox." AdultVaccination.org: "Chickenpox (Varicella)." Immunization Action Coalition: "Chickenpox (Varicella) Vaccine Questions and Answers."




Reviewed by Minesh Khatri on April 30, 2017

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What should you do if you may be having a serious reaction to the chickenpox vaccine?

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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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