Hemorrhagic disease is the most highly visible viral disease affecting whitetails and shows up in nearly every major whitetail nook. Spread by a tiny two-winged midge, EHD can kill an infected animal within days, if not sooner. Affected animals acquire a high fever and hemorrhage internally, often seeking water for fever relief. This is the reason many carcasses are discovered near reservoirs, creeks and rivers. A killing frost, knocking back the midge population, halts the spread of the disease, but hunters often stumble across numerous carcasses during hunting season in EHD hot areas.