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A time line of all speculation on and experiments pertaining to the germ theory of disease beginning in 50 BC and going to 1900
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Copyright © 1997-2008 HealthBoard.com
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A time line of all speculation on and experiments pertaining to the germ theory of disease beginning in 50 BC and going to 1900
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| |
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Copyright © 1997-2008 HealthBoard.com