Dr. Karl Landsteiner, an Austrian physician and immunologist, made a groundbreaking discovery in 1901 by identifying the ABO blood group system. This pivotal finding enabled safe blood transfusions by determining blood compatibility, revolutionizing medical science and saving countless lives. Landsteiner's work laid the foundation for modern transfusion medicine, earning him the Nobel Prize in Physiology or Medicine in 1930.
How important do you think this discovery was for humanity?

It s good information , it s important for me 
405 $degen