Anyone may develop MS, but there are some patterns.
- Most people with MS are diagnosed between the ages of 20 and 50.
- Twice as many women as men have MS.
- Studies indicate that genetic factors make certain individuals more susceptible than others, but there is no evidence that MS is directly inherited.
- MS occurs more commonly among people with northern European ancestry, but people of African, Asian, and Hispanic backgrounds are not immune.
Approximately 400,000 Americans acknowledge having MS, and every week about 200 people are diagnosed. Worldwide, MS may affect 2.5 million individuals.