My mother in law had it. Had symptoms for about a week, felt crappy so went to hospital. They admitted her, she stayed overnight then insisted they let her go back home, which they did. Within 48 hours she drove herself to the ER and checked herself back in, then declined rapidly. Ultimately she ended up on the brink where they thought she wasn't going to make it, and pulled back at the last moment, almost a month in. Another anecdote but I've heard quite a few of them like that now. Statistically he's going to make it, but lets just say I wouldn't be surprised if he suddenly tanks.