Hearing loss is one of the most common birth defects, and genetic flaws are frequently the cause. After false starts, researchers are making progress toward treating deafness with gene therapy. This in-depth piece explores the latest research in gene therapy as a way to restore hearing and profiles the work of David Corey (HMS), Bence György (HMS), Jeffrey Holt (HMS/Boston Children’s) and Gwenaëlle Geleoc (HMS/Boston Children’s). Article features current and former Bertarelli-funded PIs, including David Corey and Jeffrey Holt....