I think once we find a way to eliminate chicken dander from traveling anywhere, we'll be well on our way to finding a cure (or at least a way to contain the darn disease).
Please don't take this the wrong way-- I don't mean it in a rude way, but that is impossible in a backyard chicken keeping scenario. Chicken dander is very, very fine and it will travel! They will always make it. It's as much a part of their biology as humans shedding dead skin cells.