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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
April 1, 2024
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4 oct. 1854 - John Snow's discovery

Description:

proved cholera spreads by water by mapping cholera deaths and identified the Broad street pump as the source of infection

Ajouté au bande de temps:

14 déc. 2017

Date:

4 oct. 1854
Maintenaint
~ Il y a 169 ans