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1 ene 1796 año - 18C晚期 （英）詹纳发明牛痘接种法

Descripción:

#1796

使天花的发病率大大降低

Añadido al timeline:

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

ByGUZI
hace 7 meses atrás
4
0
3364

fecha:

1 ene 1796 año
Ahora mismo
~ 229 years ago
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