title: Evolving of live modified sheep pox viral strains: modification of indigenous viral strains.
mesh_terms: D000818:Animals; D011212:Poxviridae / Q000276:immunology / Q000472:pathogenicity*; D011213:Poxviridae Infections / Q000276:immunology / Q000662:veterinary*; D012756:Sheep; D012757:Sheep Diseases / Q000276:immunology / Q000382:microbiology*