More and more, these diseases are a public health threat, and almost every year the world's population is at risk of another disease of animal origin.

这类疾病不断增加对公共卫生的威胁。世界人口几乎每年都要受到一种新的源自动物的疾病的威胁。

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Of African origin, the disease has been spreading around the world for decades.

起源于非洲，近几十年来这种病毒已经蔓延到世界各地。

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"Disease" means "an illness or medical condition, irrespective of origin or source, that presents or could present significant harm to humans".

“疾病”意指“对人类构成或可能构成严重危害的任何病症或医疗状况，无论其病因或来源如何”。

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People of Indian origin living in the UK may be genetically more prone to coronary heart disease, researchers have said.

BBC: Indians 'genetically prone to heart disease'

Researchers from Hammersmith and Ealing Hospitals compared the way cells in a major artery function in 26 healthy people of Indian origin and 18 white men aged 35-60 who had no heart disease.

BBC: Indians 'genetically prone to heart disease'

Understanding the origin -- and the genetic behavior -- of a pathogen is the holy grail in the world of infectious disease.

CNN: Researchers say they found malaria's origin: In chimps