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The brain is protected from microbes, germs and viruses, that would otherwise enter through a barrier in the brain. In multiple sclerosis, this barrier is broken, and this causes a chain reaction of events…
Reference : Mahad, D.H., Trapp, B.D., Lassmann,H. (2015) Pathological mechanisms in progressive multiple sclérosis. The Lancet Neurology 14,183-193
Illustrations : Roselyne Chauvin