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1 jan 1796 ano - 18C晚期 （英）詹纳发明牛痘接种法

Descrição:

#1796

使天花的发病率大大降低

Adicionado na linha do tempo:

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

ByGUZI
8 meses atrás
4
0
3482

Data:

1 jan 1796 ano
Agora
~ 229 years ago
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