Are the prion diseases, like mad cow disease, Creutzfeld-Jakob disease, and other transmissible spongiform encephalopathies, all of extraterrestrial origin, introduced deliberately to drag down humanity?

These illnesses are all a product of the distorted thinking of extraterrestrials who are master geneticists and have devised many types of molecular savagery in creating life forms that are robotic in nature, and not a true creation, but have function and can impinge on living organisms and be replicated to carry out a destructive process of some kind. And that is true of the prion-caused illnesses—they are introduced into your realm by the extraterrestrials as yet another means of attacking.