there’s one hitch that’s often overlooked: “editing” is a bit of a misnomer. Scientists have mastered cutting into DNA, which gives them something akin to a “delete” key for genes, in addition to the “add” function offered by traditional gene therapy. But they can’t as easily rewrite genes letter for letter, - https://www.technologyreview.com/s/602491/can-crispr-save-ben-dupree/