Plasma HIV less than 500 copies/ml by bDNA or RT-PCR for 1 year while receiving HAART, which includes at a minimum 3 antiretroviral drugs, at least one of which is a protease inhibitor or non-nucleoside reverse transcriptase inhibitor, and plasma HIV less than 50 copies /ml by the bDNA assay, performed at the NIH, within the 4 weeks prior to enrollment;