The Yaya Foundation recently achieved a milestone in advancing towards treatments for 4H leukodystrophy when it successfully developed a mouse model. It reflects a broader effort that has allowed the organization to drive towards the development of a gene therapy to treat the rare, neurodevelopmental. We spoke to Ron Garber, co-founder and board president of the Yaya Foundation, about 4H leukodystrophy, how the organization built a research agenda, and the rapid progress it has made.