Health on MSN

Understanding different blood types: A, B, AB, and O

There are different blood types: A, B, AB, and O, with each also being Rh-positive or Rh-negative. Knowing your blood type is ...
Inverse

Scientists Develop Ingenious Way to Convert Blood Into Universal Donor Type

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 ...