Deaf Baby Girl Hears for First Time in 'Mind-Blowing' Gene Therapy Trial
Hearing loss affects about 1.5 billion people, while congenital deafnessโhearing loss present at birthโaffects approximately 1.7 out of every 1,000 children born in the U.S. The OTOF-related deafness experienced by Opal is exceedingly rare, affecting just 200,000 people worldwide.