John Snow

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Vibrio cholerae

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John Snow summary

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John Snow: Media

British physician

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anesthesia

anesthesia

How anesthesia works.

Video: © American Chemical Society (A Britannica Publishing Partner)

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John Snow

John Snow

John Snow.

National Library of Medicine

Vibrio cholerae

Vibrio cholerae

Vibrio cholerae.

© Paul W. Johnson/Biological Photo Service

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