HIV SeropositivityHIV SeroprevalenceHIV InfectionsSubstance Abuse, IntravenousCoinfectionAntiretroviral Therapy, Highly ActiveSexual BehaviorAnti-HIV AgentsRisk FactorsAnti-Retroviral AgentsSeroepidemiologic StudiesCD4 Lymphocyte CountHIV-1Viral LoadAcquired Immunodeficiency SyndromeHIVAIDS-Related Opportunistic InfectionsHIV Protease InhibitorsHepatitis CDrug Resistance, ViralReverse Transcriptase InhibitorsRNA, ViralPrevalenceAntibodies, ViralSouth AfricaCohort StudiesInfectious Disease Transmission, VerticalNevirapineAntibodies, BacterialZidovudineUgandaHIV SeronegativityBenzoxazinesMedication AdherenceChlamydophila pneumoniaePregnancy Complications, InfectiousCross-Sectional StudiesEnzyme-Linked Immunosorbent AssayImmunoglobulin GDrug Therapy, CombinationOrganophosphonatesChlamydophila InfectionsStavudineSerologic TestsRitonavirLamivudineProspective StudiesHepatitis BCD4-Positive T-LymphocytesTreatment OutcomePatient ComplianceBrazilViremiaCytomegalovirus InfectionsAdenineHIV-Associated Lipodystrophy SyndromeHIV Reverse TranscriptaseIndinavirHelicobacter pyloriHelicobacter InfectionsDNA, ViralRetrospective StudiesLopinavirAntiviral AgentsDrug Resistance, Multiple, ViralTuberculosisVirus ReplicationZimbabweHerpesvirus 2, HumanIncidenceAIDS Dementia ComplexCase-Control StudiesMalawiTreatment FailurePregnancyRural PopulationToxocariasisPapillomavirus InfectionsAIDS SerodiagnosisCytomegalovirusHomosexuality, MaleTime FactorsHIV ProteaseGB virus CBlood DonorsHepacivirusImmune Reconstitution Inflammatory SyndromeCote d'IvoireAntibodies, ProtozoanIndiaNelfinavirPyrimidinonesMultivariate AnalysisDisease ProgressionAge FactorsHerpes GenitalisLost to Follow-UpToxoplasmosisDidanosineLogistic Models