Second Teenage Boy Dies From Liver Failure After Sarepta Gene Therapy Treatment

Sarepta Therapeutics Inc. plummeted after reporting a second patient died of acute liver failure while being treated with its gene therapy for a rare muscle disorder.

The death of the 15-year-old boy comes only three months after another teenage boy who received the one-time treatment, Elevidys, died. Both cases occurred in people with Duchenne muscular dystrophy who are unable to walk, the company said.