The ABO blood group system is a classification of human blood based on the presence or absence of A and B antigens on red blood cells.

Many different blood components can be derived from donated blood. These components have different functions for different indications. This article gives an overview of the function of the different blood components available.

Acute hemolytic transfusion reaction (AHTR) is a rare but life-threatening complication of blood transfusion that occurs when the recipient’s immune system attacks the transfused blood cells and destroyed them.

Hemolytic disease of the newborn (HDN) is a condition in which a newborn baby’s red blood cells are destroyed. It is caused by incompatibility between the baby’s and mother’s blood types. HDN is preventable and treatable.