Hepatitis B e AntigensHepatitis B, ChronicAIDS SerodiagnosisSerologic TestsAntigensAntigens, BacterialEnzyme-Linked Immunosorbent AssayAntibodies, BacterialAntigens, ProtozoanAntigens, ViralAntigens, SurfaceSensitivity and SpecificityAntigens, HelminthAntibodies, ViralAntigens, NeoplasmHIV SeropositivityImmunoglobulin GImmunoglobulin MAntibodies, HelminthAntibodies, ProtozoanAntigens, FungalSyphilis SerodiagnosisCross ReactionsComplement Fixation TestsAgglutination TestsEvaluation Studies as TopicAcquired Immunodeficiency SyndromeRecombinant ProteinsHemagglutination TestsAntigens, Polyomavirus TransformingToxoplasmosisHLA AntigensHemagglutination Inhibition TestsHIV InfectionsLyme DiseaseEpitopesSeroepidemiologic StudiesImmunoenzyme TechniquesImmunoblottingHepatitis B Surface AntigensBorrelia burgdorferi GroupAntibody SpecificityHepatitis B AntibodiesFluorescent Antibody TechniqueReagent Kits, DiagnosticAntibodies, MonoclonalAntigens, CDLeishmaniasis, VisceralMolecular Sequence DataLeishmania infantumDog DiseasesH-2 AntigensAntibodies, FungalHIV-1HIV AntibodiesTime FactorsCarcinoembryonic AntigenImmunoassayDourineAntigens, Viral, TumorHepatitis B virusGlandersHepatitis BAmino Acid SequenceImmunoglobulin AHIV AntigensLeptospirosisHLA-DR AntigensReceptors, Antigen, T-CellFascioliasisParasitologyAntibody FormationClonorchis sinensisCattle DiseasesGnathostomiasisEhrlichiosisHistocompatibility AntigensProliferating Cell Nuclear AntigenEchinococcosis, PulmonaryT-LymphocytesViral LoadHepatitis B VaccinesHomosexualityImmunodiffusionFluorescent Antibody Technique, IndirectBlotting, WesternVaccinationDNA, ViralHistocompatibility Antigens Class IIHepatitis B Core AntigensProstate-Specific AntigenReceptors, Antigen, B-CellO AntigensNeutralization TestsClonorchiasisConvalescenceHorse DiseasesLatex Fixation TestsFasciolaCounterimmunoelectrophoresis