As far as I am aware there is not test yet for use on live deer so how can we say it's 100 percent fatal with out testing a group of deer known to have it control every aspect of there life until they die and then confirm it was from cwd until then the 100 percent claim is pure speculation.
There is a test for live deer—here in WI they have been netting deer, taking an anal core sample to test for CWD, collar the deer, and do a necropsy when the deer dies. CWD rates are climbing and we have deer dying from it. Lots of misinformation posted here from people that haven’t witnessed how bad it really is.