At the age of 38 I had a bad case of mononucleosis (Epstein Barr) which I never really got over. After 9 months it morphed into chronic tonsillitis, and then a year later it morphed into MS. I really think it was the nasty Epstein-Barr virus that made my immune system go haywire. Prior to that I NEVER got sick and had no identifiable MS symptoms.