> The erroneous/ cancerous will be replaced with the healthy DNA Human DNA, weighing in at gigabases, is too large to fit into viruses. Also, 'replacement' imp

> The erroneous/ cancerous will be replaced with the healthy DNA Human DNA, weighing in at gigabases, is too large to fit into viruses. Also, 'replacement' implies getting rid of the bad stuff, which isn't really explicitly contemplated here. Finally, if you are good enough at identifying cancer cells from the outside that you can target them for DNA replacement, you'll probably be better off by just killing that cell.