Patients contribute samples of blood at study entry (prior to changing or initiating potent antiretroviral therapy), Week 8 and every 8 weeks thereafter until Week 96, and (if applicable) within 30 days of confirmed virologic failure. Samples of saliva and either genital secretions or lymphoid tissue, or both, are collected at study entry (prior to changing or initiating potent antiretroviral therapy), Weeks 16, 48, and 96, and within 30 days of confirmed virologic failure. Clinical assessments and medication updates are done at study visits. Blood samples are tested for HIV-1 genotypic resistance studies, HIV-1 proviral DNA studies, and HIV-1 quantitation. If total blood volumes exceed safe limits, blood samples will not be drawn for A5077 but the A5077 protocol team will request access to plasma and PBMC samples from any coenrolled study if applicable.