Which individual is known for their contributions awarded in the study of transfusion practices?

The individual recognized for significant contributions to the study of transfusion practices is Karl Landsteiner. He is famous for his discovery of the ABO blood group system, which has been fundamental in ensuring the safety and compatibility of blood transfusions. This discovery allowed for the identification of blood types that could be safely transfused between patients, significantly reducing the risk of transfusion reactions and improving patient outcomes.

Landsteiner's work laid the groundwork for modern transfusion medicine, establishing a clear understanding of how blood types affect transfusions and the importance of matching donor and recipient blood. His findings not only enhanced transfusion safety but also opened up further research into immunohematology.

Jules Bordet made notable contributions to immunology, particularly regarding the immune system's responses, but his work is not directly centered on transfusion practices. Louis Pasteur is renowned for his development of the germ theory of diseases and contributions to vaccination, which while critical to overall medicine, does not directly pertain to transfusion. PL Mollison also contributed to transfusion medicine, particularly in understanding blood group serology and the immune response to transfusions, but Karl Landsteiner's foundational work is particularly pivotal and serves as the primary basis for all subsequent developments in the field.