Could Amacron's Long Branch Be Different From Anything Other Than Deer?

The leading hypothesis of how amacron might have emerged is that this could be a spill back event. We know there's plenty of evidence that sarus too can make its way into a wild life or into other species, rodents, for example, deer in the us. Could it have been hiding out, either in a imno compromise patient, or a n he human sort of gatherd excuse me, those a collection of private i snivs that we were discussing before? Or is this so different that it was actually selection was acting on a different species and then spilling em back into humans from there? I don't kow if whe'll ever know, but i think that people