Hepatitis B Antibody Screen (Serum)

Why This Test Is Done

Your healthcare provider may order this test to check if you’ve been exposed to hepatitis B virus (HBV) or to monitor your immune response after vaccination. It’s also used in screening for chronic hepatitis B in certain populations, such as high-risk individuals or those with risk factors like multiple sexual partners, injection drug use, or exposure to infected blood products.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm to draw a blood sample. It usually takes a few minutes. If you’re pregnant, breastfeeding, or have a bleeding disorder, let your provider know before the test.

What Happens During the Test

A healthcare professional will clean the area with an antiseptic, insert a needle into your vein, and collect blood into a tube. You may feel a slight pinch or sting, but it’s generally quick and painless. The test itself involves analyzing the serum portion of your blood for hepatitis B antibodies.

What the Results Mean

Positive results indicate the presence of antibodies, suggesting past infection or vaccination. Negative results mean no detectable antibodies at this time. Follow-up testing may be needed if you have risk factors for hepatitis B or symptoms of infection.