OK! I was told was that inserting genes with a virus like this had a tendency to cause cancer, which is why it wasn't done on humans (least of all for something

OK! I was told was that inserting genes with a virus like this had a tendency to cause cancer, which is why it wasn't done on humans (least of all for something not life-threatening). But I don't know if that is still accurate. The nanoparticles sound to me like they could be safer? Would be interesting to know whether they can be non-uniformly spread, so that only half the green cones can see one.