What's the rarest blood type?

blood type  Takeaway The ABO system is the best known way of classifying blood types In this system, there are eight main types O positive is the most common, and AB The letter in your blood type – A, B or O

Blood types are categorized into systems There are four possible types in the ABO system: A, B, O and AB In the Rh system, the presence or absence of the D A blood protein which was discovered in 1940 Those who have this Rhesus factor on their red blood cells are considered Rh positive Those who lack the factor

In blood typing, antigens on the surfaces of red blood cells are also known as agglutinogens and the antibodies that react against them Blood types: characteristics and general rules Blood types are differentiated by the presence of antigens in red blood cells and antibodies in plasma Find out