The test is done for detecting antibodies to Human Immunodeficiency Virus Infections (HIV). The HIV Ag/Ab Combo (HIV DUO) assay is a Screening test for simultaneous qualitative detection of HIV p24 antigen and antibodies to HIV type 1 and/or 2 in human serum or plasma. A single test is not confirmatory and hence diagnosis of HIV infection must be based on results of supplemental, confirmatory tests performed on repeat sample & with clinical correlation for the patient’s immune status and history.