People with the rare and fatal genetic disease spinal muscular atrophy in recent years have seen the approval of an antisense therapy as well as a gene therapy. Genentech has now won U.S. Food and Drug Administration approval for Evrysdi, the first oral, at-home treatment for the condition. We spoke to Levi Garraway, chief medical officer and head of global product development at Genentech, about Evrysdi, how it works, and how it fits into the choices physicians and patients have when it comes to treating spinal muscular atrophy.