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new strains pop up so often that by the time drug-makers create a vaccine against one variation, the serum is already out of date.
Astrogenetix利用这快速繁殖和超活性状态去遥控沙门氏菌负责感染的基因然后去除这强毒基因以建立疫苗弱毒株。
Astrogenetix took advantage of that fast-growing, super-active state to home in on the salmonella genes responsible for infectiousness, and then removed said genes to create a weak vaccine strain.
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.
我们还注意到，最近出现了新的H5N1型禽流感毒株，有可能导致目前使用的疫苗无法充分保护禽类不受疾病的侵染。
We have also observed that new H5N1 avian influenza virus strains have recently emerged creating the possibility that vaccines currently in use may not be fully protecting poultry against the disease.
他们一般在二月份就预测好六月会有哪种毒株传播，以便医药公司未雨绸缪，准备好特效疫苗。
In February, they predict which strains of virus will circulate in the fall, and drug companies prepare vaccines to produce immunity to those specific strains.
流感病毒不断发生基因变化并需要符合正在传播的流感毒株的疫苗以便产生作用，所以每年必须调整季节性流感疫苗。
Influenza viruses constantly undergo genetic changes and require vaccines that match the circulating influenza strains to be effective, so seasonal influenza vaccines have to be modified annually.
这些年来我自下意识地采取一些措施切断毒源。例如，不让我的孩子进行免疫接种，因为疫苗药液里含有汞。
I've made some perceived radical decisions over the years such as not immunizing my children due to the mercury content in the immunization fluid given to babies.
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.
几乎所有的传统流感疫苗都是通过在鸡胚中增殖病毒而获得德，这是一个缓慢的过程，某些毒株甚至更慢——包括2009年的H1N 1流感病毒。
Nearly all conventional flu vaccines are made by growing the virus in chicken eggs, a slow process that is even slower with some strains - including 2009 H1N1 flu.
验证疫苗株：制备好混合病毒后，必须进行验证以保证其确实能产生大流行毒株的外蛋白，并且是安全的，能在鸡蛋中生长。
Verification of the vaccine strain: After its preparation, the hybrid virus needs to be tested to make sure that it truly produces the outer proteins of the pandemic strain, is safe and grows in eggs.
之前与H1N1病毒有过接触史似乎是一个关键因素，可以让人识别出1976年的疫苗毒株并产生强烈的免疫应答，这就如同1976年的疫苗能让人对2009年H1N1病毒产生强烈免疫应答一样。
That prior encounter with H1N1 seemed to be the key to a robust recognition of the 1976 vaccine virus, just as having had the 1976 vaccine seems to produce a strong response to the 2009 H1N1 virus.
一旦鉴定并分离出具有大流行可能的流感病毒新毒株，大约需要5至6个月时间提供首批获批准的疫苗。
It takes approximately five to six months for the first supplies of approved vaccine to become available once a new strain of influenza virus with pandemic potential is identified and isolated.
常温耐热型弱毒活疫苗对预防畜禽疾病具有重要作用，对它的研究越来越多，尤其是耐热冻干保护剂。
Hyophilized heat-resisting protector activity vaccines was importance to prevent epidemic diseases of animals, and was studied more and more, especially in hyophilized heat-resisting protector.
当然，并非所有的血清型都具有完全相同的抗原性，不过由于目前尚无一种简单可靠的方法能够区分出各类毒株抗原性的高低，所以这些菌株都需在疫苗组成中占据较高份额。
Not all serotypes are equally antigenic and currently there is no easy way to determine whice ones are less antigenic and, therefore, should be in higher proportions in the vaccine.
用微量中和试验测定麻疹病人急性期和恢复期血清中和麻疹疫苗株和野毒株的中和抗体水平。
The neutralization antibody levels for measles vaccine virus and wild measles virus in sera of measles patients in acute phase and convalescent phase were determined by trace neutralization test.
运用减毒胞内菌运送DNA疫苗能够将DNA直接运送到专业性抗原提呈细胞(APC)内，大大提高了DNA疫苗的摄入效率。
DNA vaccine delivered by attenuated intracellular bacteria can be directly delivered into special antigen presenting cells (APCs), so it improves the efficiency of DNA vaccine to a great extent.
目的利用单克隆抗体代替常规的人、猴免疫血清进行甲型肝炎减毒活疫苗毒种外源因子检查及鉴别试验。
Objective to identify live attenuated hepatitis a (HAV) vaccine virus seed and detect adventitious agents, monoclonal antibody is used to neutralize instead of human and rhesus monkey immune serum.
如构建出突变体库，从中筛选出毒力减弱的副猪嗜血杆菌突变菌株，对研制出基因工程弱毒活疫苗具有重要意义。
So it's has great significance to construct the mutant storehouse and slecte the toxicity weak Hps mutant strain for developing the genetic engineering attenuated vaccine.
目的观察麻疹长- 47株纯化毒种制备的麻疹减毒活疫苗在8 ~10月龄人群中的接种反应及免疫原性。
Objective To observe the adverse reaction and immunogenicity induced by live attenuated measles vaccine prepared with purified virus seeds of Chang-47 strain in infants aged 8 ~ 10 months.
应用组织学方法比较观察了猪繁殖与呼吸综合征病毒（PRRSV）弱毒细胞疫苗与灭活疫苗生殖道黏膜免疫的效果。
The effect of mucosal immune of porcine reproductive and respiratory syndrome virus (PRRSV) attenuated and disactived vaccine was investigated by histological method.
“因为我们每年都会因为有新的毒株出现而开发新的流感疫苗”，牛津大学生物化学系chris Scanlan博士说道，他领导了这项研究。
'We're used to flu vaccines being reformulated every year because new strains come along,' said Dr Chris Scanlan of the Department of Biochemistry at the University of Oxford, who led the research.
为了解乙型脑炎（乙脑）减毒活疫苗弱毒株SA14142神经毒力的减弱程度，本文对弱毒株及其原株SA14强毒株进行了猴体和小白鼠的致病性和病理学变化的比较试验。
In order to study the attenuation of neurovirulence of SA14 14 2 attenuated vaccine virus, monkeys and mice were tested with the strain and its parent SA14 virulent strain.
科学家称，两种可以攻击HIV病毒多种毒株的薄弱环节的新抗体被发现，这一发现大大提高了艾滋病疫苗研制成功的希望。
Scientists say the two can attack a variety of strains of HIV, the weak link of the new antibody was found, the discovery of AIDS vaccine development has greatly enhanced the success of hope.
科学家称，两种可以攻击HIV病毒多种毒株的薄弱环节的新抗体被发现，这一发现大大提高了艾滋病疫苗研制成功的希望。
Scientists say the two can attack a variety of strains of HIV, the weak link of the new antibody was found, the discovery of AIDS vaccine development has greatly enhanced the success of hope.
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