What could possibly go wrong?

Or right

There's a pretty horrific short story about that

https://en.wikipedia.org/wiki/Blood_Music_(novel)

That's a great book, worth a read!

I would hope not, but I'm sure there's lots of science fiction predicated on similar ideas.

I'm afraid how this kind of stuff can be used to create some sort of DNA signature, lets say, for people of a giving country. A government could do it through vaccines for example.

This later could be use to spread biologic weapons that would be engineered to not attack hosts cells with that particular signature.. as everybody else that were not "marked" would die..

We need to advance a lot morally and ethically as a societies, because i'm pretty sure atomic bombs will look like child stuff compared to the harm we could do with the things being discovered.

And giving the current trends, im very pessimistic about our future prospects. We have too much corruption by design, embedded in our cultural systems.

Isn’t that he opening scene of I Am Legend?