We know that the immune system in that disease produces immunoglobulins (which are antibodies, in the spinal fluid, which is the fluid surrounding the brain and spinal chord)product antibodies there in the way that normal people do not, and there's evidence too that around the areas of damaged insulation in the central nervous system, which is the characteristic abnormality or lesion in this condition, there are cells that are known to be committed to making antibody, or to aiding the production of antibody.