Dangerous for humans, you mean. The fact that a species can survive while being so disease-ridden that they routinely kill the animals they infect seems to lend

Dangerous for humans, you mean. The fact that a species can survive while being so disease-ridden that they routinely kill the animals they infect seems to lend credence to the "super-immunity" claim. I'm not sure this is actually the case for bats, but assuming your statement is true, it seems to be evidence for the presence of super-immunity, rather than against.