Epizootic Hemorrhagic Disease, or EHD, is a virus that can be fatal to deer. Throughout parts of Pennsylvania, there is concern about what this disease will do to the deer population. Jeannine Fleegle, a wildlife biologist with the Pennsylvania Game Commission, explains that the virus is transmitted by midges, which are tiny bugs. The virus then replicates and causes more deer to get sick. Infected animals look sick, and they often have pink around their eyes and on parts of their body due to leaky blood vessels. Fleegle explains that EHD deaths usually occur in late summer and early fall. Since EHD is a vector-transmitted disease, the outbreak is over once there is a frost that kills the vectors. The public is encouraged to report animals that look sick to the Game Commission. Although there are confirmed cases of EHD in several counties, Fleegle says this year is not out of the ordinary. More information about EHD can be found here. (Photo: AP)