HIV InfectionsHIV AntibodiesAntibodiesHIV SeropositivityAIDS SerodiagnosisAntibodies, ViralHIV SeroprevalenceAntibody SpecificityVoluntary ProgramsAnonymous TestingHomosexualityAntibodies, NeutralizingAntibodies, MonoclonalAcquired Immunodeficiency SyndromeContraceptive Devices, MaleAntibodies, BacterialRNA VirusesAntibody FormationHIV-1Vaccinia virusHIVSexual BehaviorVirus ReplicationHIV AntigensFluorescent Antibody TechniqueReceptors, VirusVirus CultivationAntibody AffinityHIV-2Virus SheddingVirus DiseasesSubstance Abuse, IntravenousAIDS-Related ComplexEpitopesNeutralization TestsSimian virus 40RNA, ViralVirus AssemblyEnzyme-Linked Immunosorbent AssayMeasles virusPlant VirusesMolecular Sequence DataBinding Sites, AntibodyAntibodies, Anti-IdiotypicDNA VirusesDefective VirusesInfluenza A Virus, H1N1 SubtypeAntigens, ViralRabies virusCross ReactionsSindbis VirusReagent Kits, DiagnosticInfluenza A Virus, H5N1 SubtypeSensitivity and SpecificityAmino Acid SequenceBlood DonorsCell LineGenes, Immunoglobulin Heavy ChainContact TracingInfluenza A Virus, H3N2 SubtypeAntibodies, NeoplasmAnti-HIV AgentsHepatitis B virusAntibodies, ProtozoanRespiratory Syncytial VirusesWest Nile virusImmunoenzyme TechniquesCounselingImmunoassayViral ProteinsMass ScreeningAntibodies, AntinuclearPrevalenceRisk FactorsHomosexuality, MalePregnancy Complications, InfectiousImmunoglobulin MRisk-TakingHepatitis BVirus ActivationSexually Transmitted DiseasesGenes, ViralSexual PartnersTime FactorsHIV SeronegativityHemagglutinin Glycoproteins, Influenza VirusSimian immunodeficiency virusVirus LatencyVesicular stomatitis Indiana virusHealth FacilitiesBlotting, WesternImmunoglobulin GCercopithecus aethiopsVero CellsCells, CulturedVirionPrisonersAutoantibodiesMumps virusOncogenic Viruses