Word: ludwik
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Dates: during 1950-1959
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...John J. Bittner showed that breast cancer in certain mice is transmitted by a factor, now accepted as a virus, in mouse mothers' milk. This led to the establishment of mouse "dairies," and the painstaking milking of tens of thousands of rodents. In 1951, Dr. Ludwik Gross of The Bronx Veterans Administration Hospital injected something (evidently a virus material) from leukemic mice into newborn mice, got a high incidence of leukemia and some odd tumors to which little attention was then paid...