HBs Ag (ELISA)

HBsAg test is a blood test that detects hepatitis B surface antigen (HBsAg). HBsAb is a protein on the surface of the hepatitis B virus. High levels of HBsAg typically indicate an active hepatitis B virus infection. HBsAg is a part of the outer layer of a hepatitis B virus cell. The center of the cell contains the viral DNA