Baby is healed with first personalized gene-editing treatment

> To accomplish that feat, the treatment is wrapped in fatty lipid molecules to protect it from degradation in the blood on its way to the liver, where the edit will be made. Inside the lipids are instructions that command the cells to produce an enzyme that edits the gene. They also carry a molecular GPS — CRISPR — which was altered to crawl along a person’s DNA until it finds the exact DNA letter that needs to be changed.

That is one of the most incredible things I have ever read.

I know someone well who works in this space, personalized gene therapy as cancer treatment.

> until it finds the exact DNA letter that needs to be changed.

This pine is disingenuous (at best). There is no way of guaranteeing where the DNA is inserted. It is designed to only slot into a very specific portion of the DNA but they don't have a way to control that precisely, the accuracy is high but "exact DNA letter" is skipping over a few pretty important details.

To be clear I'm not saying it is ineffective or unsafe, only that the claim made is marketing speak and not actually true.