Hepatitis C Virus, Abs: Antibodies test for Hepatitis C Virus (HCV), used to detect current or past infection. Hepatitis B Surface, Ag: Surface antigen test for Hepatitis B Virus (HBsAg), used to detect active infection. Human Immunodeficiency Virus (HIV) 1&2, Combo (HIV COMBO): A test to detect both HIV-1 and HIV-2. It combines the detection of antibodies and early antigens for diagnosing the infection.