This is a panel of undiluted plasma samples collected from multiple donors in diverse geographical locations. Package of 20 members, 19 with reactivities for HIV-1 Group M Subtypes A, B, C, D, F, G, H, J, CRF1_AE, CRF02_AG, and HIV-2. One member is a nonreactive control. 1 vial per member. For research use only.