It does happen you know. Asthmatics can die young, epileptics can die young, people with Sickle Cell can die young, congenital heart conditions can die young and there is a whole raft of 'syndromes' that can kill you young. And that's not counting the RTAs, stabbings and murders that can kill you young (like the 15 year old girl a collegue of mine went to who was stabbed to death). I've dealt with a couple of kids dying at that age, and while it's fairly rare, it does indeed happen.