Exclusive: A couple paid more than $800,000 for a gene-editing therapy for their daughter. She died, and it wasn’t made public

Illustration: Daria Lada An investigation by Science and Retraction Watch has uncovered details about a clinical trial that resulted in the death of its sole patient: a 6-year-old girl with a rare genetic mutation affecting her cognitive development. Her death has never been reported publicly, even though the medical team published its preclinical work in…