Blood type A means that, in the ABO blood group system, red blood cells are categorized according to the antigens they carry on their surface, and when there is an A antigen and an anti-B antibody is present in the serum, it is considered to be type A blood.
The significance of blood group classification is to minimize transplant rejection when performing blood transfusions, organ transplants, and hematopoietic stem cell transplants. When blood type A receives blood of other incompatible blood types, hemolytic reaction will occur, resulting in acute high fever, chills, lumbago, hemoglobinuria, and renal failure.
Before blood transfusion, strict matching process is required, paying attention to the information matching between the blood bag and the transfusion recipient to avoid serious complications.