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Denis transfused the blood from a sheep to a 15-year old boy and later to a labourer, both of whom survived the transfusions. In 1818, British obstetrician James Blundell successfully transfused human blood to a patient who had hemorrhaged during childbirth. In 1901, Karl Landsteiner, an Austrian physician discovered the first human blood groups, which helped transfusion to become a safer practice.
Alexander Bogdanov in Moscow in 1925 devoted the science of blood transfusion for whole blood.  ]  Studies show that Dr.Charles Richard Drew was the one who invented the blood bank in 1940.American Red Cross took over and he directed many blood bamks over the world.