On briefcases for men

This is sort of weird. A man in Massachusetts has become the first human case of rabies in the state for the last 75 years. His house has bats, and they believe he was bitten by one but didn't know because their teeth are small. Just how was he bitten without knowing? In his sleep? That's gross to think you can be asleep and a bat just happens to jump on you and bite you without any cause, because if you're asleep you're not threatening them. He wasn't carrying any briefcases for men. I wonder if bats get it from biting each other. Since he wasn't found with it until he got sick, they say there's no treatment, so I guess he's going to die. Getting the shots is bad enough, dying without the shots is worse.