Even experts are stumped by multiple sclerosis (MS), the tricky autoimmune disease that affects women two to three times more often than men. To add to the confusion, there’s no diagnostic test for the disease, and one patient can experience wildly different symptoms from another. What experts do know? MS occurs when the body starts to attack its own central nervous system, and certain factors can raise one’s risk of developing the disease. Watch the video to learn about the five traits that might raise your risk of MS.