shaycrystal4
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Biology (THE SEARCH FOR BETTER HEALTH) Note on 3. During the 2nd half of the 19th century, the work of Pasteur and Koch and other scientists stimulated the search for microbes as causes of disease, created by shaycrystal4 on 21/02/2014.

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shaycrystal4
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3. During the 2nd half of the 19th century, the work of Pasteur and Koch and other scientists stimulated the search for microbes as causes of disease