Hepatitis B: Post-Vaccination Test for Immunity

Topic Overview

A post-vaccination test for immunity to the hepatitis B virus (HBV) is recommended only if you:

  • Have an impaired immune system. This can be caused by many things, such as infection with HIV or the use of medicines to prevent organ rejection.
  • Are older than age 49.
  • Received the hepatitis B vaccine in the buttock. (The vaccine is less effective when given in the buttock. It is more effective when given in the upper arm.)
  • May come in contact with other people's blood or body fluids as part of your job.
  • Are a sex partner of someone with chronic hepatitis B virus infection.

Infants born to mothers who are infected with HBV should be tested after 9 months of age, between 1 to 3 months after their final vaccine dose.

With the exception of infants, a post-vaccination test for immunity, when needed, should be done between 1 and 2 months after a person receives the last dose of vaccine.

Related Information

Credits

ByHealthwise Staff
Primary Medical Reviewer Kathleen Romito, MD - Family Medicine
Donald Sproule, MDCM, CCFP - Family Medicine
Adam Husney, MD - Family Medicine
Specialist Medical Reviewer W. Thomas London, MD - Internal Medicine, Hepatology

Current as ofNovember 18, 2017

Is it an emergency?

If you or someone in your care has chest pains, difficulty breathing, or severe bleeding, it could be a life-threatening emergency. Call 9-1-1 or the local emergency number immediately.
If you are concerned about a possible poisoning or exposure to a toxic substance, call Poison Control now at 1-800-567-8911.

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