How many people do you know that have been tested for it, none. That is why no humans have been known to have it. Now ask yourself how many people do you know that have died with Alzheimer’s. My mom did as did my father in law, the docs would not check for CWD when we asked them to. In fact they had no clue what we were talking about. Oh yea, they don’t test for Alzheimer’s either, they just diagnose you as having it when your memory starts to go. There could be cases of it, but if they don’t test, how will we ever know.