Nic Volker. Beatrice Rienhoff. Alexis and Noah Beery. If you happen to be a scientist or clinician in the genomics field, you already know the topic of this article just from those four names. Each is a child who suffered from a mysterious or even one-of-a-kind disease. Collectively, they endured years in hospitals, met dozens of doctors, took countless tests to achieve that precious objective: a diagnosis. And for each of these kids, DNA sequencing was critical to providing that answer.