http://www.medicinenet.com/multiple_sclerosis/article.htm

As of the year 2010

About 350,000 people in the U.S. have Multiple Sclerosis (MS). Usually, a person is diagnosed with MS between 20 and 50 years of age, but MS has been diagnosed in children and in the elderly. MS is twice as likely to occur in Caucasians as in any other groups. Women are twice as likely as men to be affected by MS earlier in life.

This is .1 percent or 1 in every 1000 of the USA population of 350 million people.

This estimate suggests that approximately 200 new cases are diagnosed each week.

Source: National Society of Neurological Disorders and Stroke

Multiple-Sclerosis (MS)

Demyelination by MS. The CD68 colored tissue shows several macrophages in the area of the lesion.

Specialty Neurology

Symptoms Double vision, blindness in one eye, muscle weakness, trouble with sensation, trouble with coordination 

Usual onset Age 20–50

Duration Long term

Causes Unknown

Diagnostic Based on symptoms and medical tests method

Treatment Medications, physical therapy

Prognosis 5–10 year shorter life expectancy 

Frequency  2 million (2015)

Deaths18,900 (2015)