I guess my line of thought then is that if they carry enough prion that they can infect an otherwise healthy deer, that should be the case with a human as well. And as long as CWD has been around, there has surely been more than a few CWD carrying ticks get on a human. We haven't seen a case of CWD (or a human version of it) yet, so possibly doesn't pose a threat to us for whatever reason?that's how i understood it.