 In addition, 83 specimens that were HIV antigen positive, 1121 specimens that were HIV-1 antibody positive, 201 specimens that were HIV-2 antibody positive, and 1409 specimens from US at risk for HIV infection or from HIV-2 endemic area were all obtained from specimen suppliers, except for 11 pediatric specimens collected under a separate protocol 7B5-02-05Z01-02: Collection of Pediatric and Pregnant Female Specimens Used in the Abbott Laboratories In Vitro Diagnostic HIV Assay. 