Ms Jafari 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. So, in addition to spa treatments and relaxing getaways, many also take time out of their busy schedules to be poked and prodded by doctors. And while their assistants may pick up their prescriptions, they still need to make sure to take their meds.