Dr John Snow
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Around the year 1854, a cholera outbreak hit the area called Soho,London. Many people died.
I think it is spread by water not air
they found out a nearby cesspool had been infecting the broad street pump
This is Dr John Snow, he thinks cholera is spread by water not air so he used a map and marked on it all the households where people had died and marked where water pumps are
There is a cluster of deaths at broad street pump
You should remove the broad street pump, it is the source of cholera
Really!? i will remove the handle
After the handle was removed the outbreak was slowly dying away
Thanks to Dr John Snow's work it convinced