The Regeneron press release mentions that the therapy includes a hair cell specific regulator for the gene: https://investor.regeneron.com/news-releases/news-r

The Regeneron press release mentions that the therapy includes a hair cell specific regulator for the gene: https://investor.regeneron.com/news-releases/news-release-details/otarmenitm-lunsotogene-parvec-cwha-approved-fda-first-and-only https://investor.regeneron.com/news-releases/news-release-de... That of course doesn't rule out problems, but the treatment doesn't naively turn on the protein production either.