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18 mar 1854 ano - John Snow

Descrição:

60% of people frinking water from pump had cholera
VS 7% of people drinking from another pump
it was dirty water not miasma

Adicionado na linha do tempo:

new disease

14 dez 2018

1

0

559

Data:

18 mar 1854 ano

Agora

~ 171 years ago

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