Google says the twins plus one other 1 yr younger child child were edited embryos using crispr to prevent them from getting HIV from their father(s). Which was and is unethical. They are supposedly doing fine.
Yeah, the dude just kind of went rogue. One of them was fully edited, while the other has a blend of original and altered cells, because surprise surprise China’s maddest scientist did a bad job. If they’re still doing well that’s good, because it wasn’t certain there would be no side effects.
I’m glad they and any kids they have will be around whenever we start discussing doing it properly. And yes, Dr. He Jiankhui went to jail.