Study Evaluating Vaccine in Adults With HIV

Inclusion Criteria: * 18 years of age diagnosed with HIV and on stable HAART for a minimum of six months * CD4 T-cell count greater than and equal to 350/mm3 at screening * No reported CD4 T-cell count less than 350/mm3 at any time before screening * Viral load less than 50 copies/mL at screening and no viral load greater than 400 copies/mL for a minimum of six months prior to screening Exclusion Criteria: * Any chronic symptomatic infection other than HIV * Use of any prior HIV vaccine (prophylactic and/or therapeutic) within one year before or during screening * Any malignancy that may require systemic therapy * Use of any investigational treatment within six months before screening or planned during study enrollment, except for investigational retrovirals obtained through ACTG