title: [Demanding task].
mesh_terms: D000818:Animals; D002004:Brucella Vaccine / Q000008:administration & dosage; D002006:Brucellosis / Q000662:veterinary*; D002007:Brucellosis, Bovine / Q000517:prevention & control*; D002417:Cattle; D012756:Sheep; D012757:Sheep Diseases / Q000517:prevention & control*; D012800:Siberia
chemical_list: D002004:Brucella Vaccine
vernacular_title: Otvetstvennaia zadacha.