Edward Jenner developed a vaccine from cowpox.
金纳从牛痘中发展了一种疫苗。
One day a girl came to see him who had a cowpox sore on her hand.
一天一个女孩儿来看他, 女孩儿手上有个牛痘疮。
a vaccine prepared from the cowpox virus and inoculated against smallpox
从牛痘毒素提取的用来预防天花的疫苗
A vaccine prepared from the cowpox virus and inoculated against smallpox.
牛痘苗从牛痘毒素提取的用来预防天花的疫苗
He found that people who had had cowpox seemed to be safe from catching smallpox.
他发现凡患过牛痘的人似乎对于天花具有免疫力。
In nineteen century, Enligh doctor Pearson came to Macao to spread the cowpox vaccination.
到19世纪时，英国医师皮尔逊到澳门推广牛痘术。
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