Miss Nassiri is said to have multiple sclerosis, A multiple sclerosis diagnosis can be frightening and overwhelming, but while you may feel very much alone, you are by no means the only one dealing with this condition. Multiple sclerosis is the most common neurological disease in young adults, usually striking between ages 20 and 40. Others who were sick kept is a secret and never spoke about their issues. Only after their passing do their friends and family tell the public about their affliction.Remember last year how people were talking about how crazy was for celebrity deaths?