A patient with Duchenne muscular dystrophy died after receiving a gene-editing therapy in China, sparking new concerns about regulatory oversight and transparency as China seeks to cement its position as a biotechnology leader.

With a second delayed report of a child's death in China, criticism is rising of a looser form of clinical trial. One expert: what "bothers me is the lack of transparency.'

El paciente participaba en un ensayo clínico con una terapia experimental para corregir la distrofia muscular de Duchenne