Because anything to do with genetic engineering has been banned on Earth since 1996?
Good point--and one I had forgot about. The Federation (Earth especially) seems paranoid as fuck when it comes to augments and the science behind them.
What? That blood brought a tribble back to life.
Blood is a key element in the healing process, even in normal humans.
1) Khan has remarkable recuperative abilities. They say so in "Space Seed". He brings himself back from near death.
KIRK: Bones?
MCCOY: He'll live.
KIRK: My compliments.
MCCOY: No, I'm good, but not that good. There's something inside this man that refuses to accept death. Look at that. Even as he is now, his heart valve action has twice the power of yours and mine. Lung efficiency is fifty percent better.
(McGivers enters)
KIRK: An improved breed of human. That's what the Eugenics War was all about.
MCCOY: I'd estimate he could lift us both with one arm. It will be interesting to see if his brain matches his body.
2) The little girl in act one is saved by Khan's blood.
3) The tribble is brought back to life by Khan's blood.
Connect the dots.
Good point. Wonder why Beverly, Phlox, Bashir and The Doctor never used it?
Cause they've got their magic one shot cures. "Oh you have some super alien virus that is completely rewriting your DNA! the ships is doomed!! *40 minutes and a mouthful of technobabble later* ~hsssss~ There all better."