即使在感染你的时候，感冒病毒也会发生变异，而且新的病毒毒株经常出现，以至于当制药商研制出针对其中一种变异的疫苗时，血清已经过时了。
Colds mutate even while they're infecting you, and new strains pop up so often that by the time drug-makers create a vaccine against one variation, the serum is already out of date.
尽管如此，通过利用鼻病毒株之间隐藏的相似性，可能会成功抵抗鼻病毒。
A defense against rhinoviruses might nonetheless succeed by exploiting hidden similarities among the rhinovirus strains.
有一天印度尼西亚病毒株可能极其重要。
我们必须记住：病毒和细菌的耐药株同样也能在国际上迅速传播。
And we must not forget: drug-resistant strains of viruses and bacteria also travel well internationally.
在伦敦·米尔·希尔分离到第一株人流感病毒。
The first human flu virus is isolated at Mill Hill in London.
当时，H1N1病毒新毒株既不在视野之内，也未在该文件中提及。
The new H1N1 virus was neither on the horizon at that time nor mentioned in the document.
被称为“猪流感”的病毒是一种新的甲型H1N 1流感病毒株。墨西哥的感染和死亡人数最多。
Mexico has the highest number of deaths and infections of the flu, which is caused by a new strain of the influenza a H1N1 virus.
2009大流行病毒是1998流感的变异株，性能相同。
The 2009 pandemic virus is a variant on this 1998 flu, and behaves the same way.
在这方面，将该病毒与来自以往暴发的毒株进行比较可能是有益的。
In this regard, comparisons of the virus with strains from previous outbreaks may be instructive.
而那种蛋白质是病毒变化最快的部分，因此，针对一种病毒株的抗体可能识别不出另一种病毒株。
But that protein is the fastest-changing part of the virus, so antibodies to one strain might not recognize another.
今天，我们知道一种具有大流行强大潜力的病毒，即H1N1病毒的新毒株，从世界上另一边的另一个来源产生。
Today, we know that a virus with great pandemic potential, the new strain of the H1N1 virus, has emerged from another source on another side of the world.
相反，病毒与在中国南方最近分离出的毒株相似，这表明病毒是从中国传播到泰国和老挝的。
Instead, the virus is similar to recent isolates from southern China, suggesting that the virus spread from China to Thailand and Laos.
他们把这三株小鼠全部感染了致死剂量流感病毒。
They infected all three strains of mice with lethal doses of influenza virus.
该病毒是否会产生变异，成为毒性更强的病毒株，仍有等观察。
It remains to be seen whether the virus will mutate into a more virulent strain.
H1N1病毒与过去的某些流感毒株相比生长更为高效。
The H1N1 virus itself grows more efficiently than some past flu strains.
但其中只有一小部分最终携带多个鼻病毒株。
But ultimately only a small fraction carried multiple strains of rhinovirus.
这可能是由于1977年的一次意外：当时前苏联偶然泄露了一株季节性H1N1流感病毒，此后这病毒便与通常流行的H3N2流感病毒株一起扩散开来。
We have this immunity because of a biological accident: in 1977, an H1N1 flu virus was accidentally released in the Soviet Union and has circulated ever since, alongside the regular H3N2 strains.
进一步分析证明，她们有相同的俄罗斯病毒株，这种病毒株在澳大利亚很罕见。
Further analysis established that they did have the same Russian virus strain, not commonly found in Australia.
该大流行病毒已迅速成为世界各地的首要流感毒株，因此可以假定乌克兰的大多数流感病例由H1N1病毒导致。
As the pandemic virus has rapidly become the dominant influenza strain worldwide, it can be assumed that most cases of influenza in Ukraine are caused by the H1N1 virus.
今年的季节流感疫苗含有三种流感病毒——一种甲型（H3N2）病毒，一种与猪流感毒株无关的常规季节性甲型（H1N1）病毒，以及一种乙型病毒。
This year’s seasonal vaccine contains three influenza viruses — one A (H3N2) virus, one regular seasonal A (H1N1) virus unrelated to the swine flu strain and one B virus.
尽管科学家还在研究导致这次猪流感的病毒株，专家们怀疑现有的季节性疫苗能否有效抗击它们。
Although scientists are still studying the swine-flu strain responsible for the current outbreak, experts doubt that existing seasonal vaccines can effectively combat it.
这种疫苗是根据最常见的轮状病毒毒株制成的，而且在两年的时间里也能很好地保护人体不受其它一些毒株的感染。
The vaccine is derived from the most commonly circulating strain of rotavirus, and also offered good protection against some other strains across the two-year period.
轮状病毒分许多不同的病毒株。
这种病毒缺少其他更厉害的流感所有的一些蛋白质和氨基酸，其表现与一些常见的病毒株相似，而大部分人群对这些毒株都有了免疫力。
It lacks certain proteins and amino acids that would make it as deadly as other flus. And it appears similar enough to other common strains that most people may have some immunity.
因为小鸡能把禽流感病毒株传播给人类，他们是潜在的新流行病的来源。
"Because chickens can transmit some ai strains to humans, they are a potential source for new pandemic strains," said Tiley.
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。
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。
The Norwegian Institute of Public Health has informed WHO of a mutation detected in three H1N1 viruses.
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