Multiple sclerosis is a chronic, often debilitating disease that attacks the central nervous system. Symptoms may be mild, such as numbness in the limbs, or severe, such as paralysis or loss of vision. The progress, severity and specific symptoms of MS are unpredictable and vary from one person to another. In the United States, there are approximately 400,000 people living with MS and an estimated 200 people diagnosed every week. Today, new treatments and advances in research are giving new hope to people affected by the disease.