A friend of mine from juggling club has contracted West Nile virus. He is VERY seriously ill. At first they thought it was going to kill him!
Now they are cautiously optimistic that he'll survive, but they can't say how much neurological damage will be permanent. He has general weakness, is very unsteady on his feet, and has major muscle tremors. This in a guy who's in his early 60s, and was very healthy and physically fit. He has alway been a health nut, and is a dedicated runner and a vegetarian.
The doctors say that it was his elevated fitness level that saved his life. Most other folks his age would have been done....
I hope your friend stuns the doctor's and makes a complete recovery.