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1 янв 1796 г. - Edward Jenner tests his hypothesis

Описание:

by inoculating an 8 year old boy with cowpox = variolation.

Добавлено на ленту времени:

B HLTH 224

ByKelly Stevens
13 дек 2018

Дата:

1 янв 1796 г.
Сейчас
~ 228 г назад
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