A blood test that detects protective antibodies against Hepatitis B, confirming immunity from vaccination or past infection.
The Hepatitis B Surface Antibody (HBsAb or anti-HBs) test measures whether you have protective antibodies against Hepatitis B virus. These antibodies develop either from successful vaccination or from natural immunity after recovering from infection.
Hepatitis B is a serious liver infection that can become chronic, leading to cirrhosis and liver cancer. Vaccination is highly effective at preventing infection, but immunity may wane over time in some people.
This test is commonly used to verify immunity in healthcare workers, confirm vaccination success, and check immunity status in people who may need a booster shot.
Price
$9
Results
1-2 days
Lab Network
Quest
Fasting
Not Required
What's Measured
What This Test Measures
This test measures Hepatitis B surface antibody (HBsAb/anti-HBs) levels in your blood. These protective antibodies are produced either after successful vaccination or after recovering from natural Hepatitis B infection. The test does not indicate current infection.
Who Should Consider This Test
Healthcare workers requiring proof of immunity, people unsure of their vaccination status, those who completed Hepatitis B vaccination series, people needing to verify immunity before travel or work, and individuals who recovered from past Hepatitis B infection.
Health Insights
Conditions Screened
Related Symptoms
When to Get Tested
No fasting required. For post-vaccination testing, wait 1-2 months after completing the vaccine series for accurate results. Can be tested anytime for immunity verification.
Understanding Your Results
Results are reported quantitatively in mIU/mL. Values ≥10 mIU/mL indicate immunity/protection. Values <10 mIU/mL suggest no immunity - vaccination or booster may be needed. Higher values indicate stronger immunity.
What to Expect
After placing your order, you'll receive an email from Rupa Health (our lab order partner) within 24 business hours to sign a consent form and schedule your blood draw at a Quest Diagnostics location.
The blood draw typically takes just a few minutes. Results are usually available within 1-2 business days and will appear in your secure Justlabs dashboard.
Our results include reference ranges and easy-to-understand indicators showing whether your values are within normal limits.
Frequently Asked Questions
$9
Typical hospital cash price: $100–$200
+ $28 in standard lab & physician fees at checkout (no additional bills later)
$18 lab collection + $10 physician order
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