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Get answers to your Multiple Sclerosis questions.
Multiple sclerosis (MS) is a neurological disease that involves the central nervous system (CNS), the nerves that comprise the brain and spinal cord. It has two major features:

The symptoms, severity, and course of MS vary widely depending partly on the sites of the plaques and the extent of the demyelination.
Multiple sclerosis is thought to be an autoimmune disorder. In autoimmune diseases, immune factors attack the bodyâ ' s own cells. In the case of MS, the immune system attacks the tissues that make up myelin. The damage to myelin, and nerve fibers (axon), is caused by overactivated T cells. T cells are a type of white blood cells called lymphocytes.
Doctors generally group multiple sclerosis into four major disease course categories:
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