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Ludwik Fleck (11 July 1896 – 5 June 1961) was a Polish and Israeli physician and biologist who did important work in epidemic typhus in Lwów, Poland, with Rudolf Weigl〔T Tansey (2014) ''Typhus and tyranny,'' Nature 511(7509), 291.〕 and in the 1930s developed the concept of the "''Denkkollektiv''" ("thought collective"). The concept of the "thought collective" is important in the philosophy of science and in logology (the "science of science"), helping to explain how scientific ideas change over time, much as in Thomas Kuhn's later notion of the "paradigm shift" and in Michel Foucault's concept of the "episteme". == Life == Fleck was born in Lemberg (''Lwów'' in Polish; ''Lvov'' in Russian; now L'viv, Ukraine) and grew up in the cultural autonomy of the Austrian province of Galicia. He graduated from a Polish lyceum (secondary school) in 1914 and enrolled at Lwów's Jan Kazimierz University, where he received his medical degree. In 1920 he became an assistant to the famous typhus specialist Rudolf Weigl at Jan Kazimierz University. From 1923 to 1935 Fleck worked in the department of internal medicine at Lwów General Hospital, then became director of the bacteriological laboratory at the local social assurance authority (). From 1935 he worked at the private bacteriological laboratory which he had earlier founded. With Nazi Germany's occupation of L'viv, Fleck was deported with his wife, Ernestina Waldmann, and son Ryszard to the city's Jewish ghetto. He continued his research in the hospital and developed a new procedure in which he procured a vaccine from the urine of typhus patients. Fleck's work was known to the German occupiers and his family were arrested in December 1942 and deported to the Laokoon pharmaceutical factory to produce a typhus serum. He and his family were arrested again and sent to the Auschwitz concentration camp on February 7, 1943. His task was to diagnose syphilis, typhus and other illnesses using serological tests. From December 1943 until the liberation of Poland on April 11, 1945 Fleck was detained in Buchenwald concentration camp. Between 1945 and 1952, he served as the head of the Institute of Microbiology of the School of Medicine of Maria Sklodowska-Curie University of Lublin. In 1952, he moved to Warsaw to become the Director of the Department of Microbiology and Immunology at the Mother and Child State Institute. In 1954 he was elected a member of the Polish Academy of Sciences. Fleck's research during these years focused on the question of the behavior of leucocytes in infectious and stress situations. Between 1946 and 1957 he published 87 medical and scientific articles in Polish, French, English and Swiss journals. In 1951 Fleck was awarded the National Prize for Scientific Achievements and in 1955 the Officer's Cross of the Order of the Renaissance of Poland. In 1956, after a heart attack and the discovery that he was suffering from lymphosarcoma, Fleck emigrated to Israel where a position was created for him at the Israel Institute for Biological Research. He died in 1961 at the age of 64 of a second heart attack. The Ludwig Fleck Prize is awarded annually for the best book in the area of science and technology studies. It was created by the 4S Council (Society for the Social Studies of Science) in 1992. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ludwik Fleck」の詳細全文を読む スポンサード リンク
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