Blood type
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A blood type is a classification of blood based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells. These antigens may be proteins, carbohyd
A hospital worker takes samples of blood from a donor for testing
Human blood group systems
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The term human blood group systems is defined by the International Society of Blood Transfusion as systems in the human species where cell-surface antigens—in particular, those on blood cells—are "con
Blood type
…form a blood group system. Blood types are inherited and represent contributions from both parents of an individual. As of June 2025, a total of 48 human blood group systems are recognized by the International Society of Blood Transfusion (ISBT). The two most important blood group systems are ABO and Rh; they determine…
Interpretation of antibody panel to detect patient antibodies towards the most relevant human blood group systems