Karl Landsteiner Karl Landsteiner Karl Landsteiner, , (14 June 1868 – 26 June 1943) was an Austrian biologist, physician, and immunologist. He distinguished the main blood groups in 1900, having developed the modern system of classification of blood groups from his identification of the presence of agglutinins in the blood, and identified, with Alexander S. Wiener, the Rhesus factor, in 1937, thus enabling physicians to transfuse blood without endangering the patient's life. With Constantin Levaditi and Erwin Popper, he discovered the polio virus in 1909. He received the Aronson Prize in 1926. In 1930, he received the Nobel Prize in Physiology or
Nobel Peace Prize at the time of Nobel's death. The Norwegian Nobel Committee speculates that Nobel may have considered Norway better suited to awarding the prize, as it did not have the same militaristic traditions as Sweden. It also notes that at the end of the 19th century, the Norwegian parliament had become closely involved in the Inter-Parliamentary Union's efforts to resolve conflicts through mediation and arbitration. The Norwegian Parliament appoints the Norwegian Nobel Committee, which selects the Nobel Peace Prize laureate. Each year, the Norwegian Nobel Committee specifically invites qualified people to submit nominations for the Nobel Peace Prize. The statutes of