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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.
The first organ transplant occurred in 1954, when Ronald Lee Herrick donated one of his kidneys to his brother, Richard. The surgery was led by Dr. Joseph Murray, who later wo â¦ n a Nobel prize for developing the surgical technique regarding kidney transplants.