LymphocytesLymphocyte CountCD4 Lymphocyte CountAntiretroviral Therapy, Highly ActiveHIV InfectionsAnti-HIV AgentsAnti-Retroviral AgentsLeukocyte CountLymphocyte ActivationViral LoadHIV-1CD4-Positive T-LymphocytesCD4-CD8 RatioAntigens, CD3Lymphocyte SubsetsAcquired Immunodeficiency SyndromeAntigens, CD8T-LymphocytesAIDS-Related Opportunistic InfectionsCD40 LigandLymphopeniaHIVAntigens, CD40ZidovudineCD8-Positive T-LymphocytesAntigens, CD28Reverse Transcriptase InhibitorsAntigens, CD44Antigens, CD34B-LymphocytesHIV Protease InhibitorsDrug Resistance, ViralAntigens, CDRNA, ViralHIV SeropositivityLymphocytosisCohort StudiesFlow CytometryTime FactorsInfectious Disease Transmission, VerticalAntigens, CD38Blood Cell CountPlatelet CountDrug Therapy, CombinationTreatment OutcomeAntigens, CD14NevirapineImmunophenotypingSouth AfricaMedication AdherenceAntigens, CD2BenzoxazinesProspective StudiesAntigens, CD80Antigens, CD95Cell CountAntigens, CD19ViremiaRetrospective StudiesSpleenStavudineAntigens, CD1UgandaPregnancy Complications, InfectiousLamivudineT-Lymphocyte SubsetsAntigens, CD5Interleukin-2Antigens, CD20RitonavirAntigens, CD56OrganophosphonatesAntigens, CD86HIV SeronegativityImmunity, CellularPhytohemagglutininsAntigens, CD18Disease ProgressionT-Lymphocytes, CytotoxicPatient ComplianceLeukemia, Lymphocytic, Chronic, B-CellLopinavirHIV-Associated Lipodystrophy SyndromeRisk FactorsThymus GlandCytomegalovirus RetinitisLymphocyte Culture Test, MixedCells, CulturedBiological MarkersKiller Cells, NaturalLymphocyte DepletionDrug Administration ScheduleLymphocytes, Tumor-InfiltratingFollow-Up StudiesAntigens, CD30CoinfectionLymph NodesLeukocytes, MononuclearDrug Resistance, Multiple, ViralCytotoxicity, Immunologic