not just brain tissue- Kuru (aka mad cow aka bovinespnogeiform encephaley) is transmitted by consuming “prions” which inhabit brain tissue and spinal fluids. I wont eat a Tbone steak for that reason but will roll the dice on the occasional ribeye…
anyway, its 100% fatal, no cure as Q said..
btw, prions are a new life form imo, protein CRYSTALS that replicate… Aka bio weapon, prolly created by the taffy bastards.