Blood type is said to be the universal donor. it can be transfused to people with all blood types because red blood cell have glycoprotein antigens on their surfaces. Type 'A' blood has 'A' antigens,type 'B' has 'B' antigens, type 'AB' has both, and type 'O' has neither. There are also antibodies in our blood, but they are in the plasma not red cells. These protect the body from germs. So the antibody in type 's'blood will attack cells with the'B'antigen while the antibody in type'B'blood will attack cells with the 'A' antigen. Type'O' has on antigens so it can be given to any person.