Interpret Your Hepatitis B Surface Antigen Results
Enter your HBsAg value below and get an instant, free AI interpretation — a plain-English explanation checked against WHO/IFCC reference ranges.
Medical Disclaimer
This AI-generated interpretation is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Results may vary based on individual health factors not captured here.
Always consult a qualified healthcare professional before making any health decisions. Read full disclaimer →
Hepatitis B Surface Antigen Normal Ranges
HBsAg (Hepatitis B Surface Antigen) is the first serological marker to appear after Hepatitis B virus (HBV) infection, detectable 1–10 weeks after exposure — before symptoms or liver enzyme abnormalities appear.
| Reference Range | Unit | Notes |
|---|---|---|
| Negative / Non-reactive | qualitative | Negative = uninfected; Positive = active infection |
Also reported in: S/CO ratio.
Common Causes of High HBsAg
Common Causes of Low HBsAg
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Reference ranges, causes, symptoms, preparation, and FAQs.