The ABO blood group system and the Rh blood group system were the most important systems in clinical transfusion medicine and organ transplantation because of their immunogenicity.

• ABO血型系统和Rh血型系统是人类最为重要的两个血型系统，高度的免疫原性使它们具有重要的临床意义，尤其是与临床急救输血、器官移植等关系较为密切。