Compared with the abundant and colorful audio verbal behaviors, nonverbal behaviors are really kind of silent language, noiseless but infectious.

相对于丰富多彩的有声的语言行为，非语言行为却是一种默默无声的语言，无声却富有感染力。

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Leprosy is a chronic disease caused by a bacterium, Mycobacterium leprae. It is not highly infectious but can cause severe and permanent damage to the skin, nerves, limbs and eyes if untreated.

麻风是由一种细菌，即麻风分枝杆菌引起的慢性疾病，不具有高传染性，但如果得不到治疗，可能给皮肤、神经、四肢和眼睛造成严重和永久损害。

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There's no particular bug on the radar this year, but "exposure to other infectious illnesses - colds, upper respiratory infections, influenza" are inevitable.

但今年没有特定的病毒特别让人担心，接触到其他传染性疾病-感冒，上呼吸道感染，流感，等等是不可避免的。

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The doctor came to believe that the disease was not infectious, but instead related to diet.

VOA: special.2010.05.18

In contrast, if you look at a U.S.City, ten years ago in 1997 for example, then people still died but they didn't die predominantly from infectious diseases.

相反,我们看美国的城市,例如在十年前,即一九九七年,人们还是会死亡,但是最主要的死因不再是感染性疾病

耶鲁公开课 - 生物医学工程探索课程节选

Now in some--in the chronic respiratory diseases there's some infection but most of the other things are caused by lifestyle or by other factors, not the infectious diseases.

如今一些,如慢性呼吸道疾病,有一些是传染所得,但大多数,都是生活方式或其他因素导致的,而不是感染性疾病

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

No cases have been reported in the United States, but infectious disease experts have said it would not be surprising.

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But infectious disease forces us to think differently.

CNN: Free-riding microbes: stronger, more powerful, and our fault

But analogous to infectious diseases like measles, working at the individual level can only accomplish so much.

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