prion

A prion is an abnormal protein structure, and even nature wants to get rid of prions once and for all.
This is a real scumbag, it's invisible to everyone, even for study, because it's a protein, only an abnormal protein that turns normal proteins into its own abnormal proteins, creating a zombie virus in the body of an animal, even a human. Here's a case in the UK The farmer decided to save money and ground up the skeletons of dead cows and... it was safe, the cows were made after that The meaty one was more economical and, most importantly, it looked safe, but when the meat of cows that ate bone meal started to be sold, residents unknowingly bought it. But later the farmers faced a problem: the cows began to shake and almost fall over, their bodies were thin, and the sheep scratched themselves to death and became aggressive. And most importantly, the prion was not destroyed in any way, not by radiation, not by low temperatures, only by temperatures of 2000 degrees, yes...
But don't be afraid of prion, it rarely appears anywhere. 223~ people and the number is decreasing (2022)
and the prion is 100% It is lethal, but sometimes it may happen that in more developed countries the prion will not work due to the active defense of the body in medicine or the disinfection of animals
And you will say that how it kills, and it spreads throughout the body of an animal or a person and begins to act worse and worse, and when they opened the brain, they discovered that the brain turns into a spongy structure or sponge

this is a prion