1 март 1000 г. - 1,000 AD China
Описание:
Blew dried small pox scab powder of a weaker case up nose. Observed that if the person the scab came from survived the chance of the person they were giving the scab to was higher.Добавлено на ленту времени:
Дата:
1 март 1000 г.
Сейчас
~ 1024 г назад
