Characteristics, advantages and disadvantages of the four blood types. Blood types are mainly determined by the antigens and antibodies on the red blood cell membrane in the blood. It is based on modern scientific and technological research. Common blood types are divided into four types: A, B, O, and AB, and there will be mutual influence and regulation between them. Below we will discuss the characteristics, advantages and disadvantages of various blood types from 4 aspects. Basic overview: Type A blood: Contains A antigen, and contains anti-B antibodies in the plasma. Type B blood: Contains B antigen, and contains anti-A antibodies in the plasma. Type O blood: No A and B antigens, and contains anti-A and B antibodies in the plasma. Type AB Blood: Both A and B antigens are present, but plasma does not contain anti-A