Mad cows and demented people.
D000818:Animals; D002417:Cattle; D007562:Creutzfeldt-Jakob Syndrome / Q000209:etiology* / Q000266:history; D016643:Encephalopathy, Bovine Spongiform / Q000209:etiology*; D049673:History, 20th Century; D006801:Humans; D009154:Mutation; D011328:Prions / Q000235:genetics*