title: [Role of the instrument factor in the transmission and epidemiology of viral hepatitis. I. Methodologic and methodical aspects of solving the problem].
mesh_terms: D006509:Hepatitis B / Q000453:epidemiology / Q000635:transmission*; D006801:Humans; D007267:Injections; D011446:Prospective Studies; D012107:Research Design
vernacular_title: Rol' instrumental'nogo faktora peredachi v épidemiologii virusnogo gepatita. Soobshchenie I. Metodologicheskiĭ i metodicheskie aspekty resheniia problemy