Here's something I don't understand about this, maybe someone can help explain it. To implement a change in a person, you would have to modify the DNA in every cell in their body, would you not? I understand how the change is made to DNA with CRISPR, that's clear, but how can that change be propagated to affect an entire individual? Even an embryo is multicellular, is it not?
If you were to modify the genome of a sperm cell and fertilize an egg cell with it, then the resulting individual will have the modifications in all of its cells.
the answer is you can't and there aren't any reasonable proposals to do so at the moment (this is not to say there won't be in the future). Modifying embryos at the 1-cell stage, however, is doable.
