HIV AntibodiesAntibodiesHIV InfectionsHIV SeropositivityAntibody SpecificityAntibodies, ViralAIDS SerodiagnosisAntibodies, BacterialAntibodies, MonoclonalAntibodies, NeutralizingHIV SeroprevalenceAntibody FormationVoluntary ProgramsAnonymous TestingHomosexualityAntibody AffinityAcquired Immunodeficiency SyndromeFluorescent Antibody TechniqueContraceptive Devices, MaleAntibodies, Anti-IdiotypicBinding Sites, AntibodyHIV-1HIV AntigensEpitopesSexual BehaviorAntibodies, ProtozoanAntibodies, NeoplasmAntibodies, AntinuclearCross ReactionsSubstance Abuse, IntravenousImmunoglobulin MHIV SeronegativityAutoantibodiesHIV-2Antibodies, FungalHIVNeutralization TestsEnzyme-Linked Immunosorbent AssayAIDS-Related ComplexMolecular Sequence DataAntigen-Antibody ReactionsImmunoenzyme TechniquesAntibodies, BispecificAmino Acid SequenceImmunoassayMice, Inbred BALB CSingle-Chain AntibodiesAntibodies, BlockingAnti-HIV AgentsHomosexuality, MaleReagent Kits, DiagnosticImmunoglobulin GRisk-TakingSensitivity and SpecificityAntigen-Antibody ComplexCounselingImmunoglobulin Fab FragmentsPrevalenceAntibodies, HeterophileSexual PartnersAntibodies, CatalyticBlood DonorsRisk FactorsMass ScreeningBlotting, WesternContact TracingGenes, Immunoglobulin Heavy ChainImmunoglobulin ARabbitsFluorescent Antibody Technique, IndirectPregnancy Complications, InfectiousAntibodies, Monoclonal, HumanizedHybridomasImmune SeraEpitope MappingCell LineTime FactorsPregnancyImmunizationAntibodies, AntiphospholipidHIV Envelope Protein gp120Health FacilitiesPrisonersAntigensSexually Transmitted DiseasesRecombinant ProteinsAIDS-Related Opportunistic InfectionsAntigens, BacterialCross-Sectional StudiesAntigens, SurfaceCells, CulturedImmunization, PassiveHemophilia ASalivaSeroepidemiologic StudiesHepatitis BAntigens, ViralHIV Protease InhibitorsImmunoglobulin FragmentsImmunohistochemistry