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In 1905 Koch identified the tubercle bacillus and other work on tuberculosis.
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In 1907 Laveran introduced role of protozoa in causing disease (malaria)
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immunity
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anaphylaxis
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Peyton Rous made his discovery of tumour viruses in chickens in 1916.
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role of clothes lice in the transmission of typhus
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In 1943 de Hevesy was awarded Chemistry prize for introducing isotopes as tracers in the study of chemical processes.
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Barbara McClintock made her first studies on mobile genetic elements in 1944.
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Paul Hermann Müller received the Nobel Prize in 1948 for his discovery of dichloro-diphenyl-trichloromethylmethane (DDT) as an efficient insecticide
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Yellow fever virus