前病毒整合位点、靶细胞特性和整合后的载体结构与转入基因表达的稳定性紧密相关。
The integration sites of provirus, the nature of the target cells and the structure of vectors were closely related to the stability of gene expression.
目的研究干血斑(DBS)样本用于人类免疫缺陷病毒1型(HIV - 1)感染前病毒DNA基因诊断的可行性。
Objective To assess the feasibility of detection of HIV-1 proviral DNA on Dried Blood Spot (DBS) samples by nested-PCR assay.
前一年，纽约州立大学石溪分校的一个小组复制了脊髓灰质炎病毒。
A team at the State University of New York, in Stony Brook, had made a copy of the polio virus the previous year.
这一策略被称为“暴露前预防”(PrEP)，是建立在这样的概念基础上：在接触病毒之后立即阻断HIV的自我复制可以预防感染。
This strategy, known as pre-exposure prophylaxis, or PrEP, is based on the concept that blocking HIV's replication immediately after exposure to the virus may prevent infection.
研究者发现生于1918年前的人更容易产生能中和猪流感病毒的抗体。
The researchers also analyzed samples collected from humans, and found that those born before 1918 were more likely to produce antibodies capable of neutralizing the swine flu virus.
西非埃博拉病毒病疫情暴发前，几内亚、利比里亚和塞拉利昂平均每10万人只有一到两位医生。
Prior to the outbreak of Ebola virus disease in West Africa, Guinea, Liberia, and Sierra Leone had only one to two physicians available per 100,000 population.
《国际肝病》：请问移植前抗病毒治疗能改善移植后生存率吗？
Hepatology Digest: Can pre-transplantation antiviral treatment improve the post-transplantation survival rate?
最近的担忧激发了大量研究，我们现在比四年前更加了解流感病毒和大流行问题。
Recent concern has stimulated enormous research, and we know much more about influenza viruses and pandemics than we did four years ago.
科学家认为这种病毒是5年前从马传染到狗身上的，但从未感染过人类。
Scientists believe the virus jumped from horses to dogs 5 years ago, but it has never infected a human.
在此过程中，病毒暴露在无效药物前会呈现绿色，因此可迅速区分医治天花的无效和可能有效药物。
In the process, the virus glows green when exposed to an ineffective drug, thus allowing rapid distinction between ineffective and potentially effective drugs against smallpox.
该病毒在4000万年前就已经感染我们的猴子祖先，从此它的基因被传递下来。
The virus infected our monkey-like ancestors 40 million years ago, and its genes have been passed down ever since.
10年前他们的监测项目诞生的时候，Wolfe及其同事开始研究喀麦隆猎人身上的病毒。
Ten years ago - when their surveillance vision was born - Wolfe and colleagues began studying viruses in Cameroonian hunters.
这却并非第一个人工病毒；前一年，纽约州立大学石溪分校的一个小组复制了脊髓灰质炎病毒。
It was not the first artificial virus; a team at the State University of New York, in Stony Brook, had made a copy of the polio virus the previous year.
2007年和2008年期间，共有140万名结核病患者进行了艾滋病毒检测，比前一年增加了20万人。
Between 2007 and 2008, 1.4 million TB patients were tested for HIV, representing an increase of 200,000 from the previous year.
随着前一年艾滋病毒的发现，美国食品和药物管理局(FDA)核准了第一个艾滋病毒测试方法。
Following the previous year's discovery of the HIV virus, the first HIV test is licensed by the us Food and Drug Administration (FDA).
科学家相信一年前或几个月以前，世界的某个地方，猪流感病毒感染了人并发生了变异，之后开始在人之间传播。
Scientists believe that somewhere in the world, months or even a year ago, a pig virus jumped to a human and mutated, and has been spreading between humans ever since.
几乎可以肯定这是一场病毒式市场营销活动，目的是在产品发布一到两周前逗弄大众。
It's almost certainly a viral marketing campaign teasing people ahead of some launch in a week or two.
科学家认为，至少在5年前，这种病毒就从马传给狗了，但它还从没传染给人。
The virus, scientists believe, jumped from horses to dogs at least five years ago, but it has never infected a human.
在进行移植前，病人被发现感染了少量的一种HIV病毒，X4。这种病毒不利用CCR5作为受体来感染细胞。
Before undergoing the transplant, the patient was also found to be infected with low levels of a type of HIV known as X4, which does not use the CCR5 receptor to infect cells.
在泰国，年度新增艾滋病毒感染人数从十年前的14万减少到2005年的15000。
In Thailand, the number of annual new HIV infections has fallen from 140,000 a decade ago down to 15,000 in 2005.
在有些国家，在治疗开始前便进行耐药性测试，以便确定HIV病毒是否已经对某一类药物具有了耐药性。
In some countries a drug resistance test can be carried out before treatment is started in order to determine whether the HIV is already resistant to any of the drug classes.
11年前，我被诊断出携带HIV病毒。
今天在莱索托开始了一项运动，目标是在2007年底前向所有的家庭提供艾滋病毒检测和咨询。
Today in Lesotho a campaign begins to offer HIV testing and counselling to all households by end 2007.
今天在莱索托开始了一项运动，目标是在2007年底前向所有的家庭提供艾滋病毒检测和咨询。
Today in Lesotho a campaign begins to offer HIV testing and counselling to all households by end 2007.
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