A person who has chickenpox can spread the virus even before he or she has any symptoms.
水痘患者在出现任何症状之前都可以传播病毒。
The spread may also be caused by coming into contact with something an infected person has touched and then touching your mouth, nose or eyes.
这类传播也可能是由于接触到受感染者触摸过的东西，后又接触口鼻或双眼造成的。
"You'd have to have every single person [in the world] using DEET all the time" for the resistant bugs to spread, he added.
当谈到害虫耐药性的扩散时，他如是补充，“那时你将得让这世界每一个人随时随地使用驱蚊胺”。
Many experts worry that the virus could kill large Numbers worldwide if it starts to spread easily from person to person.
许多专家开始担忧，如果禽流感病毒能随意在人群传播的话，那么禽流感将夺取许多人的生命。
If you reserve judgement and spend time making that person comfortable you will not only spread some good karma around but will earn their eternal gratitude.
如果你保留意见，花些时间让别人觉得自在，你不仅会和他们有一段愉快时光，而且会得到他们永恒的感激。
After all, negative emotions can spread, and no one wants to be around a person who adds negativity to a group.
毕竟，负面情绪是可以传播的，而且，没有人会愿意与一个充满负面情绪的人相处或者是让负面情绪的人入伍。
If more people are vaccinated in a community, it's harder for viruses to spread from person to person.
如果社会上有很多人接种，人到人的病毒传播就很困难。
The mosquitoes and birds responsible for West Nile’s spread abound where people also live, raising the odds that a mosquito that picked up the virus feeding on a robin could transmit it to a person.
由于蚊子和鸟的作用，该病毒在人口密集的地方传播开来，这样当地人被携带了病毒的蚊子叮咬过后感染该病毒的几率就增大了。
Riots that erupted in London neighborhoods over the weekend spread to four other cities yesterday, as hundreds were arrested and at least one person was killed.
8号，伦敦社区发生的骚乱事件已经扩散到其他四个城市，警方已逮捕数百人。 目前，骚乱已造成至少一人死亡。
When just one person in a group becomes happy, researchers were able to measure a three-degree spread of that person's cheer.
当群体中至少一个人变得快乐的时候，研究人员发现这个人的快乐情绪至少可以感染3级。
Thus, we spread compassion, patience, love and understanding. From one person leading by example to another.
因此，我们是作为一个榜样，将同情、耐心、关爱和理解从一个人传向另一个人。
The idea is that if you spread risks they don't disappear, they're still there, but they're spread out over many people and the impact on any one person is reduced.
这种观念就是说如果你把风险分散…，风险仍然存在，并没有消失，但如果风险分散到许多人身上，那每一个人受到风险的冲击就会减少。
Other factors include whether it causes disease, its mode of transmission, whether it can spread from person to person and whether it has spread to urban areas - via blood transfusions, for example.
其他因素包括它是否会致病、它的传播模式、它是否能在人与人之间传播以及它是否会传播到城市(例如通过输血)等等。
The microbes which adapt and survive carry genes for resistance, which can be passed on from one person to another and rapidly spread around the world.
适应并存活下来的微生物携带耐药基因，可以从一个人传给另一个人，并在世界上快速蔓延开来。
Supervised treatment helps to ensure that an infected person completes the course of medicine to cure TB and prevent its further spread.
在监督之下进行治疗有助于确保感染者完成药物疗程以治愈结核病并防止其进一步传播。
Person-to-person transmission occurs in both community and health care settings, where the virus may be spread by contaminated medical equipment, such as re-used needles.
在社区和卫生保健环境中均可发生人际传播 ，那里病毒可通过再次使用的针头等受污染的医疗设备传播。
Willis Conover was not a jazz musician. However, many people believe that he did more to spread the sound of jazz than any person in music history.
威利斯.科诺菲尔并不是一位爵士音乐人，然而，许多人认为，他对爵士乐的推广所起的作用比音乐史上的任何一位音乐人都要大。
When cases do occur, the disease has epidemic potential, as it can spread from person to person, most often during the care of patients.
在确实发生病例时，该病具有流行潜力，它可在人与人之间传播，最经常发生在照护病人期间。
Global quarantine would work in theory, but if just one person evaded it the disease would be free to spread again.
这样就在理论上形成了全球性的免疫系统，但是如果有一个人走了出来，病菌就会马上散播开来。
When people live close together, measles, mumps, and rubella viruses are more easily spread when an infected person coughs or sneezes.
当人们非常密集地生活在一起，被传染的病人咳嗽或打喷嚏的时候，麻疹、腮腺炎和风疹病毒就很容易传播开来。
When an infected person sneezes, coughs or talks, the virus is released into the air and can be spread to other people.
当被感染的人打喷嚏、咳嗽或说话时，病毒被释放出来并向周围的人群扩散。
The researchers started from the premise that densely populated cities would be good places for infectious diseases, which could spread easily from person to person.
研究人员以人口密集城市可能是传染病的易发地区为假定开始研究，在人口密集的城市中，疾病将轻易的在人与人之间互相传播。
Its spread has been limited by the fact that it can't leap easily from person to person.
禽流感的波及范围有限是因为它不能轻易地在人之间传染。
Left untreated, each person with infectious TB will spread the germs to about 10 to 15 people every year.
若不经治疗，每个传染性结核病患者每年会将病菌传播给约10至15个人。
Hav is usually spread from person to person when an uninfected person ingests food or beverages that have been contaminated with the stool of a person with the virus.
甲型肝炎通常是人与人之间传播，即未受感染者食用了由病毒携带者的粪便污染过的食物或饮料。
Hav is usually spread from person to person when an uninfected person ingests food or beverages that have been contaminated with the stool of a person with the virus.
甲型肝炎通常是人与人之间传播，即未受感染者食用了由病毒携带者的粪便污染过的食物或饮料。
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