勤洗手是避免疾病传染的有效方法之一。
Washing hands often / frequently / regularly is one of the effective ways to avoid being infected by disease(s).
也会使得你更开心，因为情绪是相互传染的。
Which tends to make you even happier, since emotions are contagious.
那么，如果幸福是会传染的，你不想去抓住它么？
Now if happiness is contagious, don't you want to put yourself in a position to catch it?
然而，笑想必是我们都乐意被传染的唯一传染病吧，不是么？
However, smile is the only infection we are all happy to be infected with, aren't we?
如此混乱也在意料之中，因为这些案件所依据的法规成文于医生完全弄清引起传染的病菌之前。
Chaos might be expected given that the law employed in such cases was written before doctors fully grasped that germs caused contagious diseases.
今年，随着硬蜱数量大量上升，传染病专家开始关注控制由这种小虫传染的莱姆病的最佳应对方法。
A rise in the number of ticks this year has infectious disease experts focused on the best way to treat the Lyme disease that the little buggers can spread.
就像你无法抗拒开心的微笑一样，微笑是会传染的，你也可以成为微笑的传播者，在帮助自己开心起来的同时也带给别人快乐。
And just like that jolly laugh you cannot resist joining in, a smile can be contagious and you as the spreader become instrumental in not only your own happiness but that of others as well.
如今，我们发现了这一先前研究合乎逻辑的延伸——如果快乐是可以传染的话，那么其他的情绪比方说孤独也会传染也就顺理成章了。
Today, we discover the logical extension of this earlier research - if happiness can be contagious, it stands to reason that other moods may also be, like loneliness.
真正的问题在于，这其中究竟有没有什么生理学上的依据在起作用，而答案很可能是肯定的。科学家发现，就连黑猩猩之间，打哈欠也是会相互传染的。
The real question is whether there's actually something physiological at work here, and the answer is likely yes: even chimpanzees mimic each other's yawns.
简单的方法能够预防呼吸道传染病。
药物固然不能阻止艾滋病的猖獗肆虐，但却能让艾滋病毒携带者活得更长一些，更不易传染他人。
Pills will not put an end to the epidemic, but they keep people with HIV alive much longer and patients become less infectious to others.
母乳有利于感觉和认知的发育，并且防止婴儿患传染病和慢性疾病。
Breastmilk promotes sensory and cognitive development, and protects the infant against infectious and chronic diseases.
例如，多吃富含微量营养素的蔬菜水果，可以提升免疫系统的功能，增加身体抵抗力，预防传染病。
For example, diets rich in fruit and vegetables, which contain immune-system boosting micronutrients, enhance the body's natural defenses against infectious disease.
当然，你仍然需要洗手，仍然应该在咳嗽时用你的袖子遮一下。可是除了这些，在这个各种传染病都蠢蠢欲动的季节，我们应该做些什么来给我们的免疫力“提神”呢？
Sure you need to wash your hands and cough into your sleeve, but what are some ways to shore up immunity during this time when infections of all kinds seem to rear their ugly head?
它可以传染，当观众一起欢笑，他们彼此的关系、他们和你的关系都会更加紧密，这还会在展示现场营造一个积极的整体氛围。
Laughter is contagious and an audience that shares a laugh becomes more connected with each other and with you; this creates a positive general vibe in the room.
在新出现的由动物传染给人类的疾病中有72%来自野生动物而非驯化动物。
72% of emerging infectious diseases transmitted from animals to humans come from wildlife as opposed to domesticated animals.
疫苗研究取得了可喜进展，对预防危及生命的传染病的几种疫苗进行的临床试验结果令人鼓舞。
Exciting developments are taking place in vaccine research with encouraging clinical trial results on several vaccines against life-threatening infectious diseases.
麻疹是一种引起并发症并造成死亡的传染性很强的疾病，即便是在既往健康的人员中也是如此，但是通过疫苗接种可完全得到预防。
Measles is a highly infectious disease that causes complications and deaths, even in previously-healthy individuals, but is fully preventable by vaccination.
“我们在研究的是治愈癌症和传染病的药物，而不是把森林砍掉用来养牛，”这个蓄着山羊胡且在二头肌上纹着BobMarley（雷鬼音乐的鼻祖）的植物学家说道。
"Instead of replacing the forest with cattle we are studying a cure for cancer and for infectious diseases, " said the botanist, sporting a goatie beard and a tattoo of Bob Marley on his bicep.
就同一个笑话大笑能展示我们对别人的接纳和认可，这也许是为什么大笑尤其有传染性的原因。
Laughing at the same joke would help us to show affiliation with others, and this may be why it is especially contagious.
总而言之，这就是要在股市突然上涨的时候抵挡住“市场先生”狂热情绪的传染。
Above all, that means resisting the contagion of Mr. Market's enthusiasm when stocks are suddenly no longer cheap.
总而言之，这就是要在股市突然上涨的时候抵挡住“市场先生”狂热情绪的传染。
Above all, that means resisting the contagion of Mr. Market's enthusiasm when stocks are suddenly no longer cheap.
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