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。
词典释义:
牛痘病毒
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。
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