請問是什麼組織發起了消滅天花運動? - 運動

By Wallis
at 2005-12-10T00:00
at 2005-12-10T00:00
Table of Contents
請問是什麼組織發起了消滅天花運動?1798年﹐英國醫生琴納首創接種牛痘。但是種痘並沒有得到大力推廣
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運動
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By Adele
at 2005-12-14T04:57
at 2005-12-14T04:57
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