Re: Gene therapy trials treat inherited blindness and deafness

On Sat, 11 May 2024, JAB wrote:

Gene therapy trials treat inherited blindness and deafness
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Scientists have restored vision and hearing in people born with
congenital blindness or deafness in two separate gene therapy trials
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https://www.dw.com/en/gene-therapy-trials-treat-inherited-blindness-and-deafness/a-69006407
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I wonder when we'll see gene therapy treatments to improve human functioning above a healthy baseline, instead of just treating deceases?
Also, with gene therapy, don't you have to "refill" every couple of years? Of course that's a massive improvement over taking medication daily, and depending on the treatment, maybe you don't have to, but I have a vague memory reading somewhere that the gene therapy results get "flushed out" of the system when cells die and your "original" ones are use to replace them.
Not a scientist so caveat emptor as always! ;)