It is also why every few decades a flu strain appears with the genetic novelty to evade our herd immunity and wreak global havoc.
这也是为什么每过几十年就会出现一个流感株，它有着足够的基因改变来攻克人群的免疫，掀起全球范围的混乱。
The swine flu strain is suspected in more than 150 deaths in Mexico and cases have been confirmed in at least four other countries.
墨西哥已有150人疑似因患猪流感而死亡，而还有至少四个国家已经出现病例。
The most severe pandemic of the past century occurred in 1918, when up to 50 million people died, and was caused by the H1N1 flu strain.
上世纪最严重的一次大流行发生在1918年，造成了近5000万人的死亡，其病源为H1N1型流感病毒。
They got their first shot to test the vaccine about two months ago, and, after 21 days, more than 85 percent showed an immunity to this novel flu strain.
约两个月前，他们接受了第一次甲流疫苗接种；21天后，超过85%的志愿者对这种新型流感病毒菌株显示出了免疫力。
More than 40 people have been sickened by the new flu strain in the United States.
在美国超过40人感染了这种新的流感病毒。
A flu strain called influenza a (H5N1) appears to have made a successful jump from birds to humans.
一种被称为甲型流感(H5N1)的病毒看来己经成功地从鸟类转移到了人类的身上。
Researchers have also been working on the 1918 pandemic flu strain that killed about 50 million people.
同时，研究人员一直在研究1918年流感的病株，那场流感造成大约5千万人死亡。
Researchers are especially concerned because this flu strain, which is quite deadly, is becoming endemic in Asia.
因为这种流感病毒相当致命，研究人员特别担心它会成为亚洲的地方病。
A council reminds residents to be vigilant and look out for dead birds after the deadly H5N1 flu strain is found in Britain.
在英国发现致命的H5N1病毒后，一家委员会提醒当地居民要时刻警惕死亡的鸟类。
H7N9, a bird flu strain most likely to strike in winter and spring, was first reported to have infected humans in China in March 2013.
H7N9禽流感病毒可能大多发生在冬季和春季，中国首次报道人类感染禽流感是在2013年三月份。
The swine flu strain that is spreading is a never-before-seen hybrid of human, swine and bird influenza but is widely known as swine flu.
猪流感病毒是一个混合人类，猪和禽流感的新型病毒。但人们普遍称为猪流感。
The research comes amid a global alert over a new swine flu strain, H1N1, that has so far killed at least 80 people and could be headed toward full-blown pandemic.
此项研究开始于全球警惕新型猪流感病毒H1N1期间。 H1N1至今已经至少杀死八十人，可能会导致流感大流行的全面爆发。
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.
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。
Although scientists are still studying the swine-flu strain responsible for the current outbreak, experts doubt that existing seasonal vaccines can effectively combat it.
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。
The worry for the UK will be the requirement for vaccine manufacturers to switch production from the seasonal flu jab to a vaccine specifically against the H1N1 swine flu strain.
英国担心此举会导致传统季节性流感疫苗的生产商转而生产针对H1N1猪流感病毒株的疫苗。
He mentioned the possibility that the California victims could have been infected by a flu strain from Asia that traveled south, or that the flu was generated in Mexico and went north.
他提到，感染加州患者的可能是一种来自亚洲的流感病毒，进而南下；但病毒也有可能源自墨西哥，随后北上传播。
For example, the method could help doctors quickly make human antibodies against a pandemic flu strain as a stop gap therapy, or to protect people against infection, said the researchers.
例如，这种方法可以帮助医生在短时间内制备出针对当时大范围流行的流感病毒的人抗体，可作为治疗的权宜之计或保护人们免于感染。
The study revealed the H5N1 flu strain caused a 17 percent loss of the same neurons lost in Parkinson's as well as accumulation in certain brain cells of a protein implicated in both diseases.
这项研究显示，H5N1禽流感病毒株能引起17%的与帕金森病相同的神经细胞丢失，还可引起与上述两种疾病相关联的某些脑细胞内的蛋白质的累积。
The study revealed the H5N1 flu strain caused a 17 percent loss of the same neurons lost in Parkinson's as well as accumulation in certain brain cells of a protein implicated in both diseases.
这项研究显示，H5N1禽流感病毒株能引起17%的与帕金森病相同的神经细胞丢失，还可引起与上述两种疾病相关联的某些脑细胞内的蛋白质的累积。
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