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Is it possible to enjoy a peaceful life in a world that is increasingly challenged by threats and uncertainties from wars, terrorism, economic crises and a widespread outbreak of infectious diseases?

当今世界，战争、恐怖主义，经济危机和大规模爆发的传染性疾病等威胁和未知因素层出不穷，人类能否在这样一个环境中享受和平生活？

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Infectious animal tuberculosis, for example, has established itself as a threat to lions in southern Africa.

VOA: special.2009.05.05

So, the concern at this time, and still remains a concern, is that infectious agents, particularly very deadly infectious agents like smallpox, could be weaponized in some way, or converted into a weapon.

当时有一些担心,现在还在担心,这些传染源,尤其是像天花非常具有致命性的传染源,可以进行某种程度的武器化,或者转变成武器

耶鲁公开课 - 生物医学工程探索课程节选

Separating our water supply from sewage and learning how to do wastewater treatment was a really important part of reducing infectious diseases.

把净水和污水分开,以及学会污水处理的方法,是减少感染性疾病传播方法中的重要部分

耶鲁公开课 - 生物医学工程探索课程节选

Typically, people ware infectious from a few days before the onset of their rash until four to five days afterwards.

BBC: 'Alarm' at suspect measles cases

If Lyons' enthusiasm for the electronic office should prove infectious, a number of new names will enter the office machine business.

ECONOMIST: The business world

Typically, people will be infectious from a few days before the onset of their rash until four to five days after the onset of the rash.

BBC: Hospital treats four for measles