Blood group O is known as the "universal donor" because it has no antigens on its red blood cells and can therefore be safely given to any blood group. Blood Group AB is known as the "universal...
A person with type O Rh D negative blood is a universal donor. A person with type AB Rh D positive blood is a universal recipient.It has to do with antigens, Rh factors, plasma compatibilities, and...
'Rhesus factor' means a blood group antigen possessed by Rh-positive people; if an Rh-negative person receives a blood transfusion from an Rh-positive person it can result in hemolysis and anemia