Earlier this year, baby KJ became the first patient in the world to receive a personalized gene editing therapy, which was developed by a team at Children’s Hospital of Philadelphia (CHOP) and Penn Medicine. In June, KJ went home after spending more than 300 days at CHOP. On this episode of Breaking Through, Madeline speaks to KJ’s parents, Kyle and Nicole, about the treatment that changed KJ’s life – and how he’s doing today.