HIV AntibodiesAntibodiesHIV SeropositivityHIV InfectionsAIDS SerodiagnosisHIV SeroprevalenceVoluntary ProgramsAnonymous TestingAntibodies, ViralAntibody SpecificityHomosexualityAntibodies, NeutralizingContraceptive Devices, MaleAntibodies, BacterialAntibodies, MonoclonalAcquired Immunodeficiency SyndromeAntibody FormationSexual BehaviorHIV-1HIV AntigensAntibody AffinityHIVSubstance Abuse, IntravenousFluorescent Antibody TechniqueAIDS-Related ComplexHIV-2Antibodies, Anti-IdiotypicBinding Sites, AntibodyRisk FactorsPrimary PreventionCounselingMass ScreeningRisk-TakingReagent Kits, DiagnosticPregnancy Complications, InfectiousEpitopesHomosexuality, MaleGenes, Immunoglobulin Heavy ChainContact TracingEnzyme-Linked Immunosorbent AssayAntibodies, ProtozoanSexually Transmitted DiseasesAntibodies, NeoplasmPrevalenceSexual PartnersAntibodies, AntinuclearBlood DonorsSensitivity and SpecificityCross ReactionsImmunoassayAnti-HIV AgentsImmunoenzyme TechniquesHealth FacilitiesPregnancyHIV SeronegativityPrisonersImmunoglobulin MAutoantibodiesNeutralization TestsMolecular Sequence DataAntibodies, FungalCross-Sectional StudiesTime FactorsUnited StatesCenters for Disease Control and Prevention (U.S.)Hemophilia ABlotting, WesternMice, Inbred BALB CAmino Acid SequenceHepatitis BAntigen-Antibody ReactionsAntibodies, BispecificSalivaImmunoglobulin GAIDS-Related Opportunistic InfectionsAntibodies, BlockingSingle-Chain AntibodiesSecondary PreventionInfant, NewbornFalse Positive ReactionsSubstance-Related DisordersAntigen-Antibody ComplexQuestionnairesImmunoglobulin Fab FragmentsAntibodies, HeterophileAntibodies, CatalyticRabbitsImmunoglobulin ACell LineFluorescent Antibody Technique, IndirectAntibodies, Monoclonal, HumanizedRNA, ViralImmunizationImmune SeraHybridomasEpitope MappingAntibodies, AntiphospholipidHIV Envelope Protein gp120Retrospective StudiesRecombinant Proteins