其中一部分来自常见的北美流感病毒，自1999年以来，它由本地猪通过呼吸相互传染。
Some of it is from viruses that are common in North America, native to pigs that have coughed it onto each other since 1999.
因为此病毒含有一些与典型性猪流感病毒相同的特征性基因。世界动物卫生组织表示，称为北美流感更为合理。
The virus does contain some genetic characteristics in common with classical swine flu, but, as the OIE says, it would be more logical to call it North American flu.
好消息是，甲型h1n 1流感是在北美流感季节快要结束时出现的，病毒可能会逐步消失并在秋天再次出现，但这将给我们数个月的准备时间。
The good news is that H1N1 is hitting North America at the tail end of its flu season. It's possible that the virus may Peter out and re-appear next autumn, but that gives us months to prepare.
该流感由俄罗斯开始迅速向欧洲传播，一直传到了北美和亚洲才逐渐减弱。
The flu began in Russia, but spread rapidly through Europe, reaching North America and Asia before tapering off.
《科学》杂志刊登的论文中，这些科学家确认，与新病毒基因关系最密切的是源于北美和欧亚大陆的猪流感病毒。
In a paper published in Science, they confirm that the closest genetic relatives of the new virus are swine-flu strains from both North America and Eurasia.
新猪流感可能已经以数不清的方式出现，在其演变途中，穿过遍布北美各地的许许多多鸟群、猪群和人群。
The new swine flu could have emerged in a myriad number of ways, passing between any number of birds and pigs and people, at locations across North America, during its evolutionary journey.
在加利福尼亚病毒样本中发现的两种菌株的基因很常见，属于北美和欧亚猪流感株。
The two strains whose genes are found in the hybrid belong to influenza families known generally as North American and Eurasian pig flu.
昨天去世的那位53岁的哥斯达黎加男性患者是北美洲以外第一例因猪流感死亡的病例。
The death of a 53-year-old man in Costa rica yesterday was the first involving swine flu outside North America.
英国和其他国家改变了他们的规则并开始测试没有与北美接触的流感患者。
The UK and other countries change their rules and start testing people who have flu but no North American contacts.
人们担心预计H1N1甲型流感今年下半年还将在北美地区再度爆发，这将是这次峰会一个迫切要讨论的话题。
Worries about an anticipated resurgence of swine flu in North America later this year is expected to be an urgent topic at the summit.
另外6个片段则可溯源至北美猪流感的爆发，并混合了禽流感、猪流感和人流感病毒。
The other six can be traced to the North American pig outbreak, which turned out to include a combination of avian, swine and human flu.
该漏洞包含人类病毒，禽流感病毒来自北美和猪病毒来自北美，欧洲和亚洲。
The bug contains human virus, avian virus from North America and pig viruses from North America, Europe and Asia.
世界卫生组织一位官员说，没有迹象显示猪流感病毒会在北美洲以外的地区传播…
There is no evidence of the swine flu virus spreading in a sustained way outside North America, a top World Health Organization official says.
世界卫生组织一位官员说，没有迹象显示猪流感病毒会在北美洲以外的地区传播…
There is no evidence of the swine flu virus spreading in a sustained way outside North America, a top World Health Organization official says.
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