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Biographical Memoirs Volume 62 (1993) / Chapter Skim
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Pages 169-171

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From page 169...
... Facing the dilemma of whether to choose a career in clinical research or stay in the laboratory, and weighing his future in postwar Europe, Jacob accepted an offer from Eugene In. Opie of the Henry Phipps Institute of the University of Pennsylvania in Philaclelphia.
From page 170...
... This last work caught the interest of Karl Landsteiner, the discoverer of the blood groups, who invited Jacob to the Rockefeller Institute as his assistant. His two years there, from 1926 to 192X, were a profound learning experience.
From page 171...
... Five leukosis viruses were isolated and studied, one of which was the fowl neurolymphomatosis virus, the agent of Marek's disease, an economic scourge of the poultry industry until its conquest by a vaccine in 1970. Other notable findings of this period were the transmission of avian leukosis by blood-sucking insects, the occurrence of high concentrations of leukemia virus in the serum of leukemic chickens, and the viral nature of the common veneren1 sarcoma of dogs, transmitted through copulation.


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