1st I feared ALS, ruled it out because of how low a chance I have of getting it, then shifted to fearing MS. Now I'm back to fearing ALS, and let me tell you... If you're afraid of MS, keep it that way. Don't upgrade to ALS fears. It's agonizing!
if you don't know what ALS is, do NOT go find out. You'll be sorry you did because the fear will drive you mad