It won't hurt him to be in a larger home, as long as he has cover. He's doing great, looks like. But as far as possibly harboring any deadly viruses to share w/ other snakes, yes he can. Sorry. Not saying it's "likely" but certainly possible. It's thought that colubrids can at least carry IBD, even if they don't themselves get sick.
https://ball-pythons.net/forums/show...Reptarenavirus
And of course IBD is only one deadly snake disease, not the only one out there to worry about.