question: My son has had MS for twenty years now. He ws treated with Tysabri and contracted PML He is still alive and trying his best to keep strong. His Doctor has not given him any medication since h left the hospital Is there a treatment for him? The PML caused a stroke and took most of his eyesight. He is also dependent on his wife and health care person to get around in a wheelchair. I feel there has tobe something that can helphim improve. Can you give him some direction as what to do. PLEASE