Learn about the HBsAg Test, its purpose, uses, normal values, test results interpretation, and more for a better understanding of your health. Get complete information on the HBsAg Test: Procedure, uses, results interpretation, and normal range. Understand how this test is used to diagnose. HBsAg परीक्षण ( HBsAg Test in Hindi) एक महत्वपूर्ण टेस्ट है जो हेपेटाइटिस बी ... The HBsAg blood test detects hepatitis B. If you're positive, you are infectious. Learn about how the test is done and what the results mean.