The ABO-Rh system of blood group typing is an immensely successful method that helps medical professionals safely perform blood transfusions throughout the world. Scientists from the French Blood ...

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.

In a groundbreaking discovery, scientists have identified a new blood type that is so rare it exists in only one person on Earth. The blood type, called “Gwada negative,” was found by researchers at ...