Human Immunodeficiency Virus 1/O/2 (HIV-1/O/2) Antigen/Antibody Test LabCorp

The fourth-generation HIV-1/O/2 assay is acknowledged to detect acute HIV infection 4-12 days earlier than third-generation assays. According to the CLSI guideline, anyone testing positive by a fourth-generation screening assay and supplemental tests (either antibody or RNA detection) should initiate care and follow-up tests for clinical staging.