Prions have been around for decades. Found in sheep, cows, deer, camels, elk, cats and ostrich. From what I remember from school, don’t eat these animals brains. (Damn!)
There is form in humans called Creutzfeldt–Jakob disease. Although some cases have been theorized to be inherited, cannibals are at high risk.
I’m not too worried about this.
"The term 'prion' was coined by Stanley B. Prusiner of the University of California School of Medicine at San Francisco in 1982 to distinguish the infectious agent that causes scrapie in sheep, Creutzfeldt-Jakob disease (CJD) in humans and bovine spongiform encephalopathy (BSE) in cattle from other, more typical infectious agents. The prion hypothesis postulates that these diseases are caused not by a conventional virus or bacterium but by a protein that has adopted an abnormal form."