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26 июн 1820 г. - Smallpox Vaccine Widespread
Описание:
By 1820, vaccination against smallpox had spread to much of the world.
Добавлено на ленту времени:
History of Pathogens
By
Mariah Kunz
14 дек 2018
1
0
416
Дата:
26 июн 1820 г.
Сейчас
~ 204 г назад
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