Of course, a behavior is so popular, just like a virus epidemic, certainly with trigger mechanism or incentive. Then how "Ice Bucket Challenge" spread?
当然，一项行为之所以流行，就跟病毒流行一样，肯定背后有起诱因或者触发机制，“挑战冰桶”是怎么这样传递下去的呢？
If the virus had been capable of spreading through the air, or if one infected person had unknowingly entered a large population center, Ebola might have become a worldwide epidemic.
如果这种病毒能够通过空气传播，或者如果一名感染者在不知情的情况下进入了人口密集的地区，那么埃博拉可能已经成为一种全球流行病。
With the COVID-19 epidemic hitting China, many of you might want to know more about the virus.
随着新冠肺炎疫情在中国爆发，你们中的很多人可能想了解更多有关病毒的信息。
The virus was first identified in 1931 during an investigation into an epidemic among sheep on a farm in the Rift Valley of Kenya.
该病毒最早于1931年确定，当时正在对肯尼亚里夫特山谷一农庄羊群中的一种流行病进行调查。
Five days since the announcement of Mexico's swine flu epidemic, the search for the source of the new virus that combines pig, bird and human influenza is focusing on three main possible sites.
在墨西哥的猪流感疫情公布五天后，对这种集猪、禽、人流感病毒于一身的新型病毒来源的搜索将目标对准了三个地方。
Others include new forms of epidemic cholera and meningitis, Hanta virus, Hendra virus, Nipah virus, and H5N1 avian influenza.
其它包括新形式的流行性霍乱和脑膜炎、汉坦病毒、亨德拉病毒、尼帕病毒以及H5N1禽流感。
Between September 2000 and January 2001, the Sudan subtype of the Ebola virus infected 425 cases, including 224 deaths, making this the largest epidemic so far documented of Ebola.
2000年9月至2001年1月，苏丹亚型的埃博拉病毒感染了425人，224人死亡，这是迄今为止埃博拉最大规模的一次流行。
In total, almost 60 million people have been infected by HIV and 25 million people killed by causes related to the virus since the epidemic started.
自从艾滋病开始流行以来，总计将近六千万人感染了艾滋病病毒，两千五百万人死于艾滋病病毒引起的各种并发症。
The us went on high alert and vaccinated thousands of people - but the virus did not spread readily enough to maintain an epidemic, and fizzled out.
当时美国给予高度关注，并给好几千人注射了预防针，但这种病毒并没有迅速扩散，没有构成流行病，后来也就慢慢消失了。
Sharing needles among injecting users is one of the primary means of spreading the HIV virus in Russia, where a hidden epidemic has seen transmission rates spiral.
在俄罗斯，与他人共同使用同一注射用针头是传播HIV病毒的主要途径，疫病暗中流行，传染率不断上升。
THE human immunodeficiency virus, HIV-1, the cause of the global AIDS epidemic, is the most intensively studied pathogen in history.
引起艾滋病全球性传播的人体免疫缺陷病毒（HIV-1），一直被人们最为集中的研究其病原体。
They reached a similar Ro figure, 1.2, when they worked backwards by tracking genetic mutations in the virus since the epidemic originated.
他们通过追踪流感开始以来的病毒基因变化往回推算，得到了近似的R值，1.2。
To learn the epidemic law of virus hepatitis in Dongli District since 1990 to 2004 and provide scientific basis for the work of prevention.
目的了解和掌握天津市东丽区1990 ~ 2004年病毒性肝炎的流行规律，为制定防治对策提供科学依据。
Intravenous injection habits are reported to be fueling an epidemic of the AIDS-causing HIV virus in the country.
据报导，静脉注射的毒瘾使引发艾滋病的艾滋病毒在阿富汗不断蔓延。
Objective To study the epidemic status of human immunodeficiency virus type 1(HIV-1)subtypes in Shenzhen and to study their transmission source and routes.
目的了解深圳地区人类免疫缺陷病毒1型（HIV-1）毒株亚型及流行情况，分析其传染来源和传播规律。
Methods: According to the principle and methods of the WHO stipulation, the influenza epidemic strains, antigen, gene variation, serum antibody and virus multi-pathogen were monitored.
方法：按who规定的原理和方法进行：对流感流行株、抗原和基因变异以及血清抗体和病毒多病原实行监测。
In this paper, the virus dynamics models including delay and epidemic models with backward bifurcation are studied.
本文主要考虑了具有时滞的病毒动力学模型以及传染病模型后向分支的问题。
Dengue virus infection is now an important arthropod borne disease worldwide with increasing number of patients and the expansion of epidemic areas.
由登革病毒感染引起的登革热是重要的虫媒病毒病，近年来患者数与流行区域都有扩大的趋势。
If the virus has continued to spread at the same rate an epidemic could be just days away, although it will be longer before it is officially declared.
如果流感病毒继续以这种速度蔓延的话，流感大流行就是之日可待的事了。虽然这个是讲会比官方公布的时间长些。
Scientists have isolated the virus causing the epidemic.
科学家们已分离出引起这种流行病的病毒。
Objective To understand the situations of influenza epidemic as well as the aberrance of the surface proteins antigenicity of influenza virus.
目的了解流感流行和流感病毒毒株表面抗原性变异情况。
Scientis have isolated the virus causing the epidemic.
科学家们已分离出引起这种流行病的病毒。
Epidemic disease, virus disease, bacterial wilt and other main plant diseases can make losses to nightshade vegetables' production.
疫病、病毒病、青枯病等主要病害的发生，每年给茄科蔬菜的生产造成严重的损失。
A pandemic is a worldwide epidemic. It is a new virus and one to which the populations will have no immunity.
大流行则是全球范围内一种流行病，是一种新出现的病毒，人群对这种病毒没有任何免疫力。
Once a virus infects domesticated birds, it can cause severe epidemic among the birds .
一旦病毒感染家养鸟类，它可以导致严重流行的鸟。
Objective To study the distribution of human immunodeficiency virus-1(HIV-1) strains subtypes in Shandong province and to study their source in order to predict the epidemic trend.
目的了解流行于山东省境内艾滋病病毒（HIV 1）毒株的亚型及各种亚型的分布特点。
The H1N1 (swine) flu, a new influenza virus, whose outbreak tested the public health systems of the whole world when preventing and controlling the spread of an epidemic.
甲型H1N1(猪)流感这一新型流感病毒的突然爆发是对世界公共卫生系统防治流行病传播的一次考验。
The phylogenetic tree showed that in recent years there existed a branch for influenza a virus of genetic characteristic different from that of epidemic strains in 1990s.
基因种系发生树表明近几年甲型流感病毒与90年代流行株存在基因特性不同的分支。
"This epidemic started, basically, with that name, and the virus that is identified is the swine influenza virus," said WHO's assistant director-general Keiji Fukuda.
“这病基本上与该名称一起开始流行。该病毒被确定是猪流感病毒。”世卫组织助理总干事福田敬二说。
Differential equations are suitable for the mathematical simulation of epidemic and virus dynamics.
微分方程是描述传染病动力学的一种有效的手段。
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