system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:If a virus works by injecting its DNA into healthy cells, why dont we Re-program the virus to inject our own healthy young DNA into our cells to prevent us from aging?
gpt
They are working on things like that.

Aging is more complicated than that. But it does include the fact that the Chromosomes in cells show aging.  Cancer is a result of uncorrected genetic damage.

Generally a virus is much smaller than our own DNA. So it is like wanting to use a back pack for a shipping container. The sizes do not match up.

Our tissues are specialized. The cells in our organs are specialized. They function the way they do because their genes have been turned off and turned on specially for what they do. You cannot just inject even your DNA into a specialized cell and expect it to work.

There is a lot of research which needs to be done before what we want can be done. Study to go into the field. Support research. Tell your congressional delegation that you want more Federal money for research instead of for bombs, and guns, and drones which make others hate us and want to destroy us.