The purpose of the test is to rapidly and qualitatively detect the presence of hepatitis B virus surface antigen (HBsAg) in a human blood, serum or plasma sample. This rapid immunochromatographic test acts as a screening test for the diagnosis of active hepatitis B virus infection.The result of the test helps healthcare professionals to quickly determine whether a person is infected with hepatitis B virus, which is important for disease management, prevention and control of the spread of infection. HBsAg is the first antigen to appear in the blood after infection, so the test allows early detection of infection