No, the disease starts exhibiting symptoms after 2-3 years. Deer average five years and can live for up to ten years in the wild, and are reproductively active

No, the disease starts exhibiting symptoms after 2-3 years. Deer average five years and can live for up to ten years in the wild, and are reproductively active that entire time. So there is definitely some evolutionary pressure; a deer infected at age 1 year would be expected, on average, to have less than half the offspring of a healthy deer.