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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。
youdao
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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。
youdao