近年来，诸如天花、霍乱等传统传染病对人民的危害有所缓解，但SAS、H1N 1流感等新型传染病的出现也使人们感到恐慌。

In recent years, such as smallpox, cholera and other traditional infectious diseases, the harm to the people somewhat eased, but the the emergence of new infectious such as SAS, H1N1 influenza, etc.

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过去三十年出现了30多种新型人类传染病，其中大部分源自动物界。

More than 30 new human infectious diseases have emerged over the past three decades, most of them originating in the animal world.

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许多修了又修的老爷车，尤其是运动型跑车，刹那间销声匿迹了，数量之众让人称奇，就好像全都被某种新型恶性传染病夺去了生命。

All of a sudden, a lot of well-maintained old cars, especially sportier models, have begun to fail in surprising numbers-as if struck down by some virulent new disease.

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