I'm asking because a friend of ours has MS. Not a very close friend but someone in our "circle" who I see from time to time and every time I see him I'm a little shocked at how much the illness seems to have progressed. He's in a wheelchair now and has some trouble speaking, although he can still carry on a conversation if you're patient. What i'm wondering is what kind of long-term prognosis is he likely to have? Is it possible that he could stay as he is and be around for another 20 years or so or is it more likely that he will continue to deteriorate and could even die in the forseeable future? I hope this doesn't sound crass, it's just that when friends mention that he's not doing well I don't really know if that means he's just having a bad week and that he will be back to his baseline next week or that he's just getting sicker and sicker. Anyone with any experience of this would be really appreciated.