Where exactly does hantavirus come from?
Before I start, I want to clarify that I'm actually not interested in the strain of hanta on the cruise ship, or worried about that strain specifically. I'm interested in the virus as a whole because about a month ago my roommate and I rescued some baby wild roof rats and I'm wondering if it's possible they have it, and if so, how they would have contracted it.
I've read a lot of conflicting information, from "baby rats/mice can't carry the virus/would die if they caught it" to "babies can absolutely carry it and show no symptoms" and "it can be spread through birth/nursing from the mother" to "it can't be spread from mother to baby." I've read that it only spreads from rodent to rodent through fighting and that it possibly develops through coprophagy (eating their own/other rodents' feces), which is apparently something both wild and domesticated rats do.
Does anyone know how exactly it develops in the first place? Is it possible for a baby wild rat to carry it and survive? Where would it get it from as a baby? If it doesn't get it in the wild, can it develop it due to coprophagy or something else somewhere down the line?