Yellowstone confirms first case of "zombie deer disease."
Yellowstone National Park confirms its first case of "zombie deer disease," or chronic wasting disease (CWD), in mule deer near Cody, Wyoming. The National Park Service estimates 10-15% of the deer have CWD. The disease, found in 31 US states, is fatal and has no treatment or vaccine. While no human cases have been reported, the CDC advises caution for those in contact with infected animals and their meat.