3 март 1854 г. - John Snow
Описание:
John Snow, known as the father of epidemiology, discovered cholera was coming from a well in a neighborhood that was contaminated with cholera. He broke off the pump to the well and infection rates droppedДобавлено на ленту времени:
Дата:
3 март 1854 г.
Сейчас
~ 170 г назад
