What type of disease is multiple sclerosis?

Multiple sclerosis (MS) is considered an autoimmune disease in which the body’s immune system destroys the substance that protects nerve fibers in the brain and spinal cord.

MS News Fact

Emmy Award-winner Christina Applegate, 49, has announced in a tweet Monday, Aug. 9, 2021, that she has multiple sclerosis, describing her diagnosis as a “tough road.” “It’s been a strange journey. But I have been so supported by people that I know who also have this condition,” wrote the Dead to Me actress.