BSE and variant CJD. Humans can live with BSE so long as they do not eat brains.
Grant
H
H
D000818:Animals; D001921:Brain; D002417:Cattle; D007562:Creutzfeldt-Jakob Syndrome / Q000635:transmission; D016643:Encephalopathy, Bovine Spongiform / Q000635:transmission*; D005506:Food Contamination; D006801:Humans; D012608:Scrapie / Q000635:transmission*; D012756:Sheep