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Cities of the 19th century were breeding grounds for disease. Find out how poor living conditions played a role and how the discovery of the germ led to public health reforms still seen today.
video
national geographic
documentary
earth
cities
disease
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Source: national geographic
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Source: national geographic
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Source: national geographic
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Source: national geographic
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Source: national geographic
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Source: national geographic
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added by lilyZ
Source: national geographic
added by lilyZ
Source: national geographic
added by lilyZ
Source: national geographic
added by lilyZ
Source: national geographic
added by lilyZ
Source: national geographic
added by lilyZ
Source: national geographic
added by lilyZ
Source: national geographic
added by -lostgirl-