In 1996, the World Health Assembly recommended that all remaining stocks of smallpox (variola) virus be destroyed.
1996年，世界卫生大会建议销毁所有剩余的天花病毒储存。
This research was recommended by the WHO Advisory Committee on Variola Virus research in November 2004, and is intended to develop better medicines, vaccines and diagnostics for smallpox.
这项研究是由世卫组织天花病毒研究咨询委员会2004年11月建议的，旨在针对天花开发更好的药物、疫苗和诊断办法。
The vaccinia virus is a non-dangerous virus used in the smallpox vaccine because it is related to the variola virus, which is the agent of smallpox.
痘苗病毒使用在牛痘苗时是无害的，因为它与作为传播天花媒介物的天花病毒相关。
The vaccinia virus is a non-dangerous virus used in the smallpox vaccine because it is related to the variola virus, which is the agent of smallpox.
痘苗病毒使用在牛痘苗时是无害的，因为它与作为传播天花媒介物的天花病毒相关。
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