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Hepatitis B: Postvaccination Test for Immunity - Topic Overview

A postvaccination 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 at 9 to 15 months of age.

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

    This information is produced and provided by the National Cancer Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National Cancer Institute via the Internet web site at http:// cancer .gov or call 1-800-4-CANCER.

    WebMD Medical Reference from Healthwise

    Last Updated: October 29, 2012
    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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