Viral LoadHIV InfectionsCD4 Lymphocyte CountAnti-HIV AgentsAntiretroviral Therapy, Highly ActiveHIV-1HIV SeropositivityAnti-Retroviral AgentsHIVSociobiologyCoinfectionViremiaRNA, ViralAcquired Immunodeficiency SyndromeCytomegalovirus RetinitisMedication AdherenceAIDS-Related Opportunistic InfectionsCohort StudiesSouth AfricaDrug Resistance, ViralCD4-Positive T-LymphocytesCross-Sectional StudiesInfectious Disease Transmission, VerticalDisease ProgressionTreatment OutcomePrevalenceHepatitis CProspective StudiesRisk FactorsPatient ComplianceRetrospective StudiesHIV SeronegativityBrazilHIV SeroprevalenceTime FactorsDNA, ViralMultivariate AnalysisHIV Protease InhibitorsSimian Acquired Immunodeficiency SyndromeSimian immunodeficiency virusAntiviral AgentsHIV AntigensHIV Core Protein p24HIV Long-Term SurvivorsPlasmaVirus ReplicationAIDS SerodiagnosisHomosexuality, MaleUgandaMacaca mulattaCD8-Positive T-LymphocytesBranched DNA Signal Amplification AssaySexual BehaviorGenotypeHepacivirusPolymerase Chain ReactionHIV Reverse TranscriptaseGenetic LoadVirus SheddingReagent Kits, DiagnosticHepatitis C, ChronicReverse Transcriptase InhibitorsDrug Therapy, CombinationHIV-2Risk-TakingReceptors, HIVHIV ProteaseSexual PartnersHIV Envelope Protein gp120OrganophosphonatesCytomegalovirus InfectionsSubstance Abuse, IntravenousPapillomavirus InfectionsZambiaNevirapineDrug MonitoringAIDS Dementia ComplexCD4-CD8 RatioRitonavirTreatment FailureHIV EnteropathyHepatitis B virusZidovudineBacterial LoadRibavirinCytomegalovirusKenyaHepatitis B, ChronicAfrica South of the SaharaHeterosexualityPregnancy Complications, InfectiousInterferon-alphaEpstein-Barr Virus InfectionsLeukocytes, MononuclearVirologyHIV Fusion InhibitorsAntibodies, ViralPolyomavirus InfectionsSpecimen HandlingMalawi