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...in sheath]] that surrounds nerve fibers in the [[central nervous system]] (CNS) and [[peripheral nervous system]] (PNS). ...[Guillain-Barré Syndrome]] (GBS). It can also occur as a result of certain infections, such as [[Lyme disease]], or exposure to toxic substances.

* [[B cell]] - a white blood cell that makes antibodies to fight infections caused by foreign proteins * [[CNS]] - see Central nervous system

* [[Central nervous system]] (CNS): The part of the nervous system consisting of the brain and spinal cord. ...tes, are cells of the immune system involved in defending the body against infections and foreign substances.