The blood type Rh-null known as golden blood is the rarest type known in the world as few. It was first discovered in an Aboriginal Australian and is extremely rare with fewer. Pin On Rh Negative Blood Traits The Rh blood group is one of the most complex blood groups known in humans. . The Rh deficiency syndrome also known as Rh-null syndrome is a blood disorder where people have red blood cells RBCs lacking all Rh antigens. The Rh blood group system is a human blood group. As Mosaic reported the type is so rare that only about 43 people have been reported to have it. One of the worlds rarest blood types. Blood type O is the most common of the blood groups. Rh-null is considered a universal blood for anyone with a rare blood type within the Rh system. If your blood has the protein youre Rh positive. Rhesus Rh factor is an inherited protein found on the surface of red blood cells. If your blood lacks the.