title: [Obtaining attenuated strains of virus hepatitis in ducklings].
mesh_terms: D000818:Animals; D004372:Ducks; D006507:Hepatovirus / Q000276:immunology*; D007114:Immunization; D014765:Viral Vaccines; D014774:Virulence; D014776:Virus Cultivation
chemical_list: D014765:Viral Vaccines
vernacular_title: Poluchenie attenuirovannykh shtammov virusnogo gepatita utiat.