"Multiple sclerosis (MS) is a condition of the central nervous system, interfering with nerve impulses within the brain, spinal cord and optic nerves. It is characterised by sclerosis a Greek word meaning scars. These scars occur within the central nervous system and depending on where they develop, manifest into various symptoms.
MS affects over 25,600 in Australia and more than two million diagnosed worldwide." (Visited 14/03/2019 - What is MS?)