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Are there any dangers or side effects associated with the hepatitis A vaccine?

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In very rare cases, people can have a severe allergic reaction to the hepatitis A vaccine. This usually happens within a few minutes to hours of getting the shot. In extremely rare cases, the reaction can cause death. It's important to remember that the risks from the disease are much greater than the risk from the vaccine itself. Signs of a severe reaction to the hepatitis A vaccination include:

Other minor reactions to the hepatitis A vaccine that may last 1-2 days may include:

If you have any signs of a severe reaction:

  • High fever
  • Behavior changes
  • Trouble breathing
  • Hoarseness or wheezing
  • Hives
  • Paleness
  • Weakness
  • Fast heartbeat
  • Dizziness
  • Soreness at the site of injection
  • Headache
  • Fatigue
  • Call the doctor or get to a doctor right away
  • Describe when you had the vaccine and what occurred
  • Have a health care professional report the reaction

From: Hepatitis A Vaccine for Adults WebMD Medical Reference

SOURCES:

National Foundation for Infectious Diseases: "Facts About Hepatitis A for Adults."

National Network for Immunization Information: ''Hepatitis A.''

CDC: "Hepatitis A Vaccine: What You Need to Know" and ''Vaccine Excipient & Media Summary.''

Immunization Action Coalition: "Hepatitis A Vaccine: Questions & Answers."

Reviewed by Minesh Khatri on April 30, 2017

SOURCES:

National Foundation for Infectious Diseases: "Facts About Hepatitis A for Adults."

National Network for Immunization Information: ''Hepatitis A.''

CDC: "Hepatitis A Vaccine: What You Need to Know" and ''Vaccine Excipient & Media Summary.''

Immunization Action Coalition: "Hepatitis A Vaccine: Questions & Answers."

Reviewed by Minesh Khatri on April 30, 2017

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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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