3. HIV viral load (VL) < 50 copies/ml as measured by any FDA-approved test for quantifying HIV-1 RNA during the six months prior to study entry (PSE). The timing of the viral load may be longer than 6 months depending on the schedule of the last clinic visit attended by the subject. The intent of the protocol was to assess viral load status at the previous clinic visit which may occur at an interval longer than six months due to the scheduling constraints of the UNC Infectious Diseases clinic. Viral loads drawn > than 6 months (but not > 8 months) prior to the study entry visit are acceptable. A single "blip" of > 50 and < 200 copies/ml is permissible provided the most recent VL is <50 copies/ml.