The disease seems to be very localised...right where I live they have it pretty bad. Last summer I shot(fair game year round in iowa) a 48 lb male that was amost hairless. No more hair on its body than my arm...never seen the like. unfortunatly no photos though, thought it was too ugly
But then even a few dozen miles away I hear there is no problem. It seems like half the coyotes I get in the fall are not too good either, especialy the older ones. One thing I know it is not decreasing their numbers a bit. One of my best bowhunting spots was virtually shut down a couple of years ago when a pack moved in...that is untill i removed 6 of them.