The Norwegian Institute of Public Health has informed WHO of a mutation detected in three H1N1 viruses.

挪威公共卫生研究所向世卫组织通报说，在三株h1n 1病毒中检测出一株变异病毒。

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Although information on all these cases is incomplete, several viruses showing the same mutation were detected in fatal cases, and the mutation has also been detected in some mild cases.

虽然有关所有这些病例的资料尚不完整，但在死亡病例身上已发现有若干病毒呈现出同样的变异，在一些较轻病例身上也发现了病毒变异情况。

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Since April 2008, cases due to type 1 polio genetically linked to viruses from northern Nigeria have been detected in Benin, Burkina Faso, Ghana, Niger, Mali and Togo.

2008年4月以来，在贝宁、布基纳法索、加纳、尼日尔、马里和多哥发现了与尼日利亚北部病毒有基因关联的1型脊髓灰质炎病例。

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Virus-monitoring company MessageLabs said it had detected and stopped 155, 528 e-mail viruses by the end of November - a rate of one every three minutes.

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And while many viruses exploit well-known holes in Microsoft software, Scob aims at vulnerabilities no one had detected before.

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