世界上第一支真正意義上的天花疫苗是1796年英國人琴納(Edward Jenner)發明的,用的是牛身上的病毒。 琴納的疫苗1805年傳入中國,因為接種牛痘比人痘安全,遂逐漸取代了接種人痘古法。
現在德國人從羊駝身上取經,或將終結新冠病毒!病毒從動物來也從動物去,這就是自然法則。
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