system
Given the following post, respond as if you're commenting on Reddit:
human
Is there any such thing as good virus?


I know we can genetically modify bacteria to become useful and I'm wondering if there's any chance of doing the same thing a virus. If there is, what are the hypothetical applications it can have?
And no, i'm not talking about vaccines here.
gpt
Sure. There are viruses that infect and kill bacteria. We could use them to treat disease in lieu of, or in addition to, antibiotics. The concept of gene therapy also uses retroviruses to inject new material into the genome.