- Plasma HIV-1 RNA below detected limit obtained by Food and Drug Administration (FDA)-approved assays (limit of detection: 75, 50, 40, or 20) for greater than or equal to 2 years on cART. Participants must have at least one documented HIV-1 RNA less than the limit of detection 12-24 months prior to screening and one HIV-1 RNA less than the limit of detection within 12 months prior to screening. NOTE: A single unconfirmed plasma HIV-1 RNA greater than the limit of detection but less than 1,000 copies/mL is allowed if followed by HIV-1 RNA below detectable limits, but none in the 6 months prior to screening.