Arriving full-term amidst a flurry of excitement, Tygh Derossett’s birth at a Kentucky hospital in 2016 mimicked that of most newborns. He cried, he received Apgar scoring, and he got a bath. On his second day of life, Tygh’s health care team took a few drops of his blood and sent it to Kentucky’s newborn screening lab. A few days later, Tygh left the hospital with his parents, Amanda and Aarron, and the new family…