SMA is like the childhood version of ALS. Muscles lose strength and atrophy, affecting ability to crawl, walk, swallow and eventually breath. It is the number 1 genetic killer of children under the age of two. We are soooo close to a cure! This is Miller, he has type 2 and was diagnosed at 15 months. He has never walked but crawled until about 18 months. He will charm your pants off with his wit and his dimples!