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.
Current as of: September 23, 2020
Author: Healthwise Staff
Kathleen Romito MD - Family Medicine
Donald Sproule MDCM, CCFP - Family Medicine
Adam Husney MD - Family Medicine
W. Thomas London MD - Hepatology