| Date | 1849 |
| Author | Snow |
| Contribution | Essays on cholera, stating that it is water-borne, and transmitted by mouth. |
| Reference | Norman |
| Notes | John Snow published first a self-published essay for the benefit of his professional peers and friends, and in the same year an essay in London Medical Gazette for a slightly broader medical readership. It was prompted by his experience in the 1848-49 London outbreak of cholera, from which he concluded that cholera was not transmitted by miasma, and, further, that it was transmitted in drinking water. See Steven Johnson, The Ghost Map, Riverhead Books, New York, 2006. See Budd 1849. See Snow 1854. |
| Category | Causation |
| Pathogen Class | Bacteria |
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