The last couple of weeks has been particularly distressing for Duchenne muscular dystrophy patients and their families. The fate of Sarpeta’s gene therapy for the disease, called Elevidys, has been the center of a dizzying saga that seems to change by the minute.

Vinay Prasad has stepped down as head of the FDA’s biologics division just two months into the job, following growing backlash over how he handled Sarepta’s Elevidys, the only approved gene therapy for Duchenne muscular dystrophy.