 - HIV-1 RNA level below the limit of quantification using a FDA-approved assay for at least 24 weeks prior to study entry and confirmed within 60 days prior to study entry. The assay used for eligibility can be performed by any U.S. laboratory that has a CLIA certification or its equivalent. NOTE: Single determinations that are between the assay quantification limit and 200 copiesmL are allowed as long as the preceding and subsequent determinations are below the level of quantification. 