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18 marzo 1854 anni - John Snow
Descrizione:
60% of people frinking water from pump had cholera
VS 7% of people drinking from another pump
it was dirty water not miasma
Aggiunto al nastro di tempo:
new disease
By
Tassya
14 dic 2018
1
0
405
Data:
18 marzo 1854 anni
Adesso
~ 170 years ago
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