Multiple sclerosis (MS) is a neurodegenerative disease in which the immune system attacks the myelin that protects nerve fibers, upsetting the flow of information between the brain and the body. It affects about 2 million people worldwide, and in its more severe, progressive form, no good treatments are available.  Although MS is known to run in certain families, attempts to find genes linked to the … Continue reading Human study identifies the genetic cause of familial multiple sclerosis.