Scientists from China and Canada have successfully transplanted a human kidney after the organ’s blood type was converted from type A to the universal type O using special enzymes for the first time.

Every two seconds, an American needs a blood transfusion. But blood transfusions aren’t as simple as taking one person’s blood and giving it to another. There are four different types, but type O ...

Scientists from China and Canada have successfully transplanted a human kidney after the organ’s blood type was converted from type A to the universal type O using special enzymes for the first time.