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1 gen 1796 anni - 18C晚期（英）詹纳发明牛痘接种法

Descrizione:

#1796

使天花的发病率大大降低

Aggiunto al nastro di tempo:

人教版高中历史|Chinese students' PEP SENIOR HIGH HISTORY TEXTBOOKS

29 set 2024

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3810

Data:

1 gen 1796 anni

Adesso

~ 229 years ago

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