We can do some editing of some of the somatic cells in adults, and those edits have some effect. Reaching all of the somatic cells is actually quite difficult.

We can do some editing of some of the somatic cells in adults, and those edits have some effect. Reaching all of the somatic cells is actually quite difficult. We have had significantly better results with germline genetic engineering in animal models. If you really need to reach all the cells, that's how you'll do it. For example, if your trait is developmental in nature. Try it at home: https://diyhpl.us/wiki/genetic-modifications/ https://diyhpl.us/wiki/genetic-modifications/