The HbsAg (Hepatitis B Surface Antigen) Qualitative Test is a blood test used to detect the presence of Hepatitis B Virus surface antigen in the blood. 🧪🩸

• “Qualitative” means the test only detects whether HBsAg is present or absent; it does not measure the amount.
• Presence of HBsAg indicates that a person is infected with Hepatitis B, either acutely or chronically.