Ever hear of Kuru
Yes. As I understand it, it’s a prion-related disease picked up through cannibalism. It’s caught when somebody eats a person with Creutzfeld-Jakob disease or maybe another prion variant. They also call it the laughing death, IIRC, as it is accompanied by an inability for an affected person to control his emotions, similar to that pseudo-bulbar affect that Danny Glover used to go on about on the Tee Vee.