Each type can also be either Rh-positive (+) or Rh-negative (-), depending on whether they carry the Rh factor protein. Knowing your blood type is critical in emergencies, as receiving the wrong blood ...

If you have this type, you can give blood only to people who are A positive or AB positive. A negative. If you have this rare blood type (like 6.3% of the U.S. population), you can donate blood to ...

James Harrison’s legacy is at the heart of a wild story about canny science, boundless goodwill and an errant blood ...

your blood being positive or negative doesn’t play as big a role as the blood type group. Once you know whether you’re type O, A, B, or AB, you can plan your snacks and meals around which ...