I recommend you watch the TNG Season 2 episode where Dr. Pulaski and Data visit a colony that's doing genetic engineering of children, and their engineered immu

I recommend you watch the TNG Season 2 episode where Dr. Pulaski and Data visit a colony that's doing genetic engineering of children, and their engineered immune systems create some kind of virus that Pulaski has to fix on a shuttlecraft. The Federation's opinion of the subject is very strong in some episodes, and in others they completely forget about it.