title: Border disease in Norway.
mesh_terms: D000818:Animals; D005260:Female; D005315:Fetal Diseases / Q000662:veterinary*; D009664:Norway; D011247:Pregnancy; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology*; D014036:Togaviridae Infections / Q000453:epidemiology / Q000662:veterinary*