diseases

History of the Plague

These articles look at the historical sources that may help to trace the spread of the Plague, caused by the bacterium Yersinia pestis, considering how it spread from East Asia to other parts of the world.

Polluted Water

This article discusses the shift in perception regarding polluted water. When did perceptions of polluted water change, when was it no longer considered a part of everyday life? And what caused the tide to turn?