Inserting an entire gene into brain cells using an Adeno-Associated Virus (AAV) is less precise than gene editing, as it doesn't control the specific genomic location of insertion and may infect various cell types within a region.

“the work that I was doing when I was a graduate student with car diero is that we were we're simply trying to insert the gene into brain cells and when we did that we weren't as meaning you don't get to care where it goes specifically um we can get it into the rough area in the brain but there are many different types of cells there Y and so we weren't as precise in our ability to to Target those cells”