What Does "Hepatitis B Two-Pair Half 15" Mean?
A positive result for HBsAg and HbcAb in the Hepatitis B Virus (HBV) two-pair-half test indicates acute HBV infection or chronic HBV carriage with weak infectivity. HBsAg, the first indicator in the Hepatitis B two-pair-half test, is the outer shell material of virus replication, which appears 1-2 weeks after HBV infection, indicating HBV infection. A positive HBsAg result indicates that the body has been infected with HBV. HbcAb, the fifth indicator in the Hepatitis B two-pair-half test, is an antibody produced against HBV core antigen, representing the window period of acute infection and not a protective antibody in humans. A positive HbcAb result indicates the presence of HBV core antibody in the body, indicating either current or past HBV infection. HBV core antibodies are present in individuals who have been infected with HBV for life.