Multiple Sclerosis is a nasty condition, that is usually lifelong and unpredictable. I know of one girl who died and three others suffering in different ways. The worst part is just not knowing what the future might bring. It is most common in people in the prime of life. One person I know was a very good cancer nurse. Sadly, she can no longer do this.
Research continues and there are some promising signs. I certainly hope they find a cure.
See http://www.bbc.co.uk/news/health-39256584 .