Harvard Health Blog
Researchers may have discovered a cause of multiple sclerosis
By: Robert H. Shmerling, MD, Faculty Editor, Harvard Health Publications Multiple sclerosis (MS) is a condition that causes damage to the substance that covers nerve cells. This interrupts normal communication between nerves, leading to problems with movement, speech, and other functions. We donít know what causes MS but we think it is an autoimmune disease. What is an autoimmune disease?