It’s hard to tell from the original article if they are employing mRNA to deliver the CRISPR altered material.
But it does mention lipid nanoparticles, and those are used to encase mRNA so that your body’s enzymes don’t destroy it before it can do something useful. That was Robert Malone’s great discovery.
So it does sound like mRNA could be the delivery system that they are using. If it’s what I think they are doing, the mRNA would instruct the boy’s own defective liver cells to produce genetically corrected versions that can produce the missing enzyme.
The CRISPR part would precede this. It would start with one of his own liver cells, use CRISPR to add the missing enzyme sequence, and then use the resulting DNA to “express” the mRNA code for the corrected cell.