The spread of flu by carrier is akin to flying people or birds, meaning regional variations can spread quickly around the world.

流感通过载体的传播就像是人们坐飞机或是鸟儿飞翔一样，意味着区域变异会很快传播到世界各地。

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There is also great concern that flu might be carried to poor African nations by migrating birds.

还有一个令人十分担忧的问题是，禽流感可能会通过侯鸟传向非洲国家。

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While everyone seems to agree that the best strategy for dealing with the threat of a human pandemic is to control flu in birds, little clarity emerged in Geneva on how money would be allocated.

尽管大家都赞同应对禽流感在人类爆发的最佳方法就是控制它在禽类中流行，但是，在日内瓦会议中并没有明确提出需要多少资金。

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In Proceedings of the National Academy of Sciences (PNAS), they say that flu-carrying birds may change migratory patterns during La Nina conditions.

BBC: La Nina 'linked' to flu pandemics

Last year a new strain of H3N8 flu jumped from birds to mammals and was responsible for the death of more than 160 seals off the New England coast.

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But the virus doesn't appear to notably sicken infected birds, unlike H5N1, another avian-flu virus that is deadly in birds and occasionally infects people.

WSJ: Bird Flu Found Outside China's Mainland