Heterocyclic Compounds, Bridged-RingRNA-Directed DNA PolymeraseHIV Reverse TranscriptaseHIV InfectionsReverse Transcriptase InhibitorsHIV SeropositivityHIV-1Anti-HIV AgentsHIV SeroprevalenceHIV SeronegativityTelomeraseReverse Transcriptase Polymerase Chain ReactionDrug Resistance, ViralZidovudineRibonuclease HHIV Protease InhibitorsMolecular Sequence DataAcquired Immunodeficiency SyndromeHIV AntigensHIV ProteaseBase SequenceAIDS SerodiagnosisRNA, ViralDideoxynucleotidesAvian myeloblastosis virusCD4 Lymphocyte CountNevirapineViral LoadVirus ReplicationAnti-Retroviral AgentsHIV Core Protein p24Templates, GeneticSexual BehaviorHomosexuality, MaleAdenineBenzoxazinesThymine NucleotidesRisk-TakingMutationOrganophosphonatesReverse TranscriptionSouth Africa