MS is an autoimmune disorder. Claiming that you could voluntarily give yourself the condition through counterproductive meditation is emblematic of the general mystic nonsense of yogiism. You'll never be able to levitate, either.
Sorry, I wasn't "claiming" it gives a person MS, more so i used the word "Think" as a colloquial sentence starter to get the person's mindset visualizing how certain dis-eases can alter a nervous system's function. Esp at the later stages of the practice, usually after decades of sense refinement from body scanning.