Every year in Catalonia 15 new cases of Creutzfeldt Jakob Disease are diagnosed. It is a deadly prion disease whose cause is unknown and has no treatment, though it is very similar to mad cow disease, also brought on by prions and otherwise known as CJD variant. The challenge has always been to diagnose prion diseases when a person or an animal is suffering from them, since currently the definitive diagnosis can only be made once the patient is dead.
* This article was originally published here