HIV Core Protein p24Viral Core ProteinsHIV InfectionsHIV SeropositivityHIV SeroprevalenceHIV-1HIV SeronegativityAcquired Immunodeficiency SyndromeMolecular Sequence DataAnti-HIV AgentsAIDS SerodiagnosisProteoglycansChondroitin Sulfate ProteoglycansSexual BehaviorCD4 Lymphocyte CountAmino Acid SequenceHomosexuality, MaleHIV AntigensHIVSensitivity and SpecificityHepacivirusRisk-TakingViral LoadAnti-Retroviral AgentsBase SequenceSubstance Abuse, IntravenousVirus ReplicationPrevalenceSouth AfricaCell LineRNA, ViralAIDS-Related Opportunistic InfectionsHepatitis B Core AntigensSexual PartnersTumor Suppressor Protein p53Polymerase Chain ReactionHIV Protease InhibitorsDecorinRisk FactorsDNA, ViralLimit of DetectionAggrecansHeparan Sulfate ProteoglycansZimbabweViral ProteinsCD4-Positive T-LymphocytesCondomsProstitutionAIDS Dementia ComplexHepatitis CGlycosaminoglycansAntiretroviral Therapy, Highly ActiveHIV Envelope Protein gp120Protein BindingExtracellular Matrix ProteinsCross-Sectional StudiesTime FactorsHeparitin SulfateUnsafe SexUgandaCells, CulturedMutationEnzyme-Linked Immunosorbent Assay