SMRTR Science & EngineeringMay 3, 2026Recode

Some deaf children are hearing again because of a new gene therapy

SMRTR summary

A toddler born deaf began responding to sound just six weeks after receiving a single gene therapy injection. The FDA approved Otarmeni, made by Regeneron, on April 23, after 80% of trial patients gained measurable hearing. Gene therapy nearly died after a 1999 patient death but recovered through safer delivery methods. The main challenge now is cost — similar treatments run up to $3.5 million.

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