Hepatitis B Core Antibody, Serum (Qualitative)

What This Test Measures

The test detects the presence of hepatitis B core antibodies (HBcAb) in your serum. These antibodies appear after your body has encountered the hepatitis B virus, either through infection or vaccination. The test is qualitative, meaning it only tells you whether antibodies are present or not, not their exact amount.

Why It’s Done

Doctors may order this test if you have risk factors for hepatitis B, such as exposure to the virus (e.g., unprotected sex, sharing needles, or household contact with an infected person), or if you’re part of a group at higher risk (e.g., certain ethnicities, healthcare workers). It can also be used to screen before certain procedures or vaccinations.

What to Expect Before the Test

No special preparation is needed for this test. You may have a small needle inserted into your arm to draw blood. The process usually takes a few minutes, and you can return to your normal activities afterward.

What the Results Mean

If the test is positive, it means your body has produced antibodies against hepatitis B core antigen, suggesting past or possible current infection. A negative result means no detectable antibodies were found, indicating either no exposure or immunity from vaccination.