- Fulfilled PACTG P1024's definition of HAART (taking 3 or more antiretrovirals [ARVs] from at least 2 of the available therapeutic drug classes) during PACTG P1024's vaccination period (Weeks 0 to 24). Patients who were taking 3 nucleoside reverse transcriptase inhibitors during that period without a non-nucleoside reverse transcriptase inhibitor or a protease inhibitor (PI) are not eligible for this study. Nontherapeutic boosting doses of ritonavir used in ritonavir-boosted PI regimens are not counted as separate ARVs.