Add Yahoo as a preferred source to see more of our stories on Google. A person's blood type is determined by "the presence or absence of certain antigens – substances that can trigger an immune ...

Blood transfusions are a cornerstone of modern medicine, saving lives during surgeries and emergencies. But for people with extremely rare blood types, finding a compatible donor can be a matter of ...

Blood transfusions in a lab. We take a look at Rh-null blood, better known as "golden blood," a rare blood type that fewer than 50 people in the world have. If your blood type is O negative, you’re ...

Only one in every six million people have the Rh null blood type. Now researchers are trying to grow it in the laboratory in the hope it could save lives. Blood transfusions have transformed modern ...

When you’re pregnant, you may learn that your baby isn’t your type — blood type, that is. Every person is born with a blood type — O, A, B, or AB. And they’re also born with a Rhesus (Rh) factor, ...

A person's blood type is determined by "the presence or absence of certain antigens – substances that can trigger an immune response if they are foreign to the body," according to American Red Cross.