The surgery comes at a turning point in the quest to tell if animal-to-human transplants could help ease the shortage of donated human organs.

The recipient was Tim Andrews, a 66-year-old New Hampshire resident who had end-stage kidney disease and was on dialysis for more than two years.

With the procedure, Tim Andrews, 66, of Concord, New Hampshire, became the fourth person in the world to receive a genetically-edited pig kidney He was discharged from the hospital on Feb. 1, with his new kidney functioning as expected.