Viral LoadAntiretroviral Therapy, Highly ActiveHIV InfectionsAnti-HIV AgentsAnti-Retroviral AgentsCD4 Lymphocyte CountHIV-1Drug Resistance, ViralRNA, ViralHIVReverse Transcriptase InhibitorsAcquired Immunodeficiency SyndromeHIV Protease InhibitorsViremiaInfectious Disease Transmission, VerticalNevirapineSouth AfricaZidovudineMedication AdherenceBenzoxazinesAIDS-Related Opportunistic InfectionsDrug Therapy, CombinationStavudineCohort StudiesRitonavirHIV SeropositivityOrganophosphonatesCD4-Positive T-LymphocytesPregnancy Complications, InfectiousLamivudineLopinavirPatient ComplianceTreatment OutcomeUgandaTreatment FailureAdenineDrug Resistance, Multiple, ViralDNA, ViralCoinfectionAntiviral AgentsBotswanaHIV-Associated Lipodystrophy SyndromePlasmaIndinavirDrug MonitoringAIDS Dementia ComplexDidanosinePyrimidinonesVirus ReplicationImmune Reconstitution Inflammatory SyndromeHIV Reverse TranscriptaseProspective StudiesSimian Acquired Immunodeficiency SyndromeTime FactorsGenotypeMalawiDisease ProgressionNelfinavirSimian immunodeficiency virusDideoxynucleosidesCD8-Positive T-LymphocytesLost to Follow-UpZambiaAfrica South of the SaharaDrug Administration ScheduleRetrospective StudiesDirectly Observed TherapyRisk FactorsHIV Long-Term SurvivorsCross-Sectional StudiesHIV ProteaseCote d'IvoireCD4-CD8 RatioAfrica, SouthernMacaca mulattaVirus SheddingOxazinesHepatitis CLongitudinal StudiesFollow-Up StudiesPregnancyLymphoma, AIDS-RelatedSaquinavirPrevalencepol Gene Products, Human Immunodeficiency VirusPolymerase Chain ReactionKenyaHepacivirusDeveloping CountriesCytomegalovirus RetinitisHepatitis C, ChronicViral TropismZimbabweHIV Fusion InhibitorsHIV Wasting SyndromeHIV-2Lymphocyte CountCyclohexanesLipodystrophyMutation