HIV SeropositivityHIV SeroprevalenceHIV InfectionsSubstance Abuse, IntravenousHepatitis BHepatitis CHepatitis ASexual BehaviorRisk FactorsHepatitis B virusSeroepidemiologic StudiesHepatitis B Surface AntigensHepatitisHepatitis C, ChronicHepatitis A virusHepatitis, Viral, HumanHepatitis B, ChronicHepatitis B AntibodiesHepatitis B VaccinesHepatitis AntibodiesHepacivirusHepatitis A VaccinesHepatitis, ChronicHepatitis C AntibodiesHepatitis B Core AntigensHepatitis A AntibodiesHepatitis A Virus, HumanHepatitis B e AntigensHepatitis B AntigensHepatitis EHepatitis E virusHepatitis, Viral, AnimalHepatitis, AutoimmuneAntibodies, ViralHepatitis VirusesHepatitis Delta VirusHepatitis DHepatitis, AnimalAntiviral AgentsViral Hepatitis VaccinesImmunoglobulin GPrevalenceSerologic TestsAntibodies, BacterialEnzyme-Linked Immunosorbent AssayHepatovirusChlamydophila pneumoniaeRNA, ViralChlamydophila InfectionsMurine hepatitis virusHepatitis C AntigensDNA, ViralBlood DonorsHIV SeronegativityInterferon-alphaLiver CirrhosisHepatitis A AntigensHepatitis delta AntigensAlanine TransaminaseHepatitis AntigensRibavirinHepatitis, AlcoholicHelicobacter InfectionsHelicobacter pyloriViral LoadHepatitis B Virus, DuckCross-Sectional StudiesToxocariasisCytomegalovirus InfectionsViral Nonstructural ProteinsLiverCase-Control StudiesVirus ReplicationAntibodies, ProtozoanCarcinoma, HepatocellularHepatitis B Virus, WoodchuckGenotypeHIV-1BrazilAcquired Immunodeficiency SyndromeImmunoglobulin MToxoplasmosisMolecular Sequence DataLiver NeoplasmsLamivudineAIDS SerodiagnosisHerpesvirus 2, HumanToxocaraSyphilisRural PopulationCohort StudiesHomosexualityCoinfectionAge FactorsPolyethylene GlycolsViral Core ProteinsPolymerase Chain ReactionProspective StudiesHomosexuality, MaleHepatitis D, Chronic