The patient was in kidney failure and her immune system would reject a human organ. Scientists hope genetically modified pig organs prove safe and will alleviate the organ shortage and save lives.

Surgeons at Massachusetts General Hospital said they transplanted a genetically edited pig kidney into a living human for the first time. The 62-year-old recipient has end-stage kidney disease.

A five-way kidney swap was a chain of selfless kindness that allowed several people to help their loved ones and others.