Your lifetime chance of getting ALS is about 1 in 1000. Your chances of getting ALS in any given year are about 1 in 50,000. For those who see the "1 in 1000" lifetime odds and get worried, consider that your lifetime chances of dying of cancer are about 1 in 4, of a car accident about 1 in 150, and of something are pretty close to 1 in 1 (most people alive today will die eventually, much as we don't want to think about it).