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。
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。
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。
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。
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。
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。
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。
H1N1 appears to be passed easily from person to person, and reports from the United States suggest that some cases may be mild and therefore may go undetected, allowing the disease to spread further.
H1N1表明容易人际间传播并且从美国的报告提出，某些病例可以很轻微并且在之前未察觉，而疾病却进一步传播。
That's about as many people in the U.S. with TB, but unlike TB, M. avium-related disease doesn't spread from person to person.
这个基本和美国肺结核患者的数量差不多，但是又不似肺结核，鸟结合分支杆菌相关的疾病并不会在人与人之间传染。
They are caught directly from the excreta of these animals by people living in rural areas and then spread person to person.
生活在农村地区的人直接逮到这些沾染排泄物的动物，然后病毒得以迅速传播。
Now that we understand how the flu virus protects itself so that it can spread from person to person, we can work on ways to interfere with that protective mechanism.
现在我们明白了流感病毒是如何保护自己并在人际间传播的，因此我们可以研究如何‘干扰’这种保护机制。
Human cases of swine flu are uncommon but can happen in people who are around pigs and can be spread from person to person.
人患猪流感的病例比较罕见但是可以发生在与猪接触的人群并且能在人与人之间传播。
Infection is spread from person to person by direct contact with nose and throat discharges, saliva, fluid from blisters, or the stool of infected persons.
人与人直接接触导致感染蔓延，呼吸道分泌物，唾液，疱疹的脓液或患者的粪便都是潜在的传染源。
Researchers are worried about the virus changing so that it could spread from person to person.
研究者担心病毒通过变异而能够从人传染给人。
SARS is a highly infectious respiratory disease. The primary way that SARS appears to spread is by close person-to-person contact via droplets or skin touch.
非典型肺炎是一种传染性很强的呼吸道传染疾病，它主要是通过近距离空气飞沫和密切接触画传播。
"This virus is substantially different from what we've seen in the past and it has the potential to spread from person to person," he said.
“这种病毒与我们以前见过的病毒有本质上的区别，有可能通过人传染人。”他说。
The disease is not spread from pets, but it can be spread by person to person.
从宠物是不会传播的疾病，但它可以通过人与人之间传播。
The WHO sent a team of specialist to China last month to learn more about the H7N9 virus. Doctor Fakuda said there is still not enough evidence to show it can spread easily from person to person.
世卫组织上月向中国派出专家小组以了解H7N9禽流感，Fakuda博士说，尚无足够证据显示这种疾病可在人之间轻易传播。
And, along with my collaborator, James Fowler, we began to wonder whether obesity really was epidemic and could it spread from person to person like the four people I discussed earlier.
我与同事JamesFowler开始研讨肥胖症是否真的是一种流行病，是否可以从一个人传染到另一个人身上，就如我之前讨论的那四个人一样。
If your friends and family get fat, chances are you will too, researchers report in a new study that suggests obesity is "socially contagious" and can spread easily from person to person.
如果你的朋友和家人发胖了，你也得小心了！一项最新研究表明，肥胖具有“社会传染性”，很容易在人与人之间传播。
Swine flu viruses have been reported to spread from person-to-person, but in the past, this transmission was limited and not sustained beyond three people.
已报道猪流感病毒能在人间传播，但在过去，这传播是有限的并且不能连续超过3人。
To date, the H5N1 virus does not infect humans easily, and it is very difficult for the virus to spread from person to person.
到目前为止，H5N1病毒还不易感染到人类，在人类之间传染也非常困难。
To date, the H5N1 virus does not infect humans easily, and it is very difficult for the virus to spread from person to person.
到目前为止，H5N1病毒还不易感染到人类，在人类之间传染也非常困难。
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