兽医官员说，目前没有听说有人感染了禽流感。
Animal health officials say there have been no reports of humans contracting the disease.
兽医官员表示，该变种出现在越南和中国，对人类的威胁尚不可知。
The variant appeared in Vietnam and China and its risk to humans cannot be predicted, veterinary officials said.
2008年以来，禽流感病例持续增加。据联合国粮农组织高级兽医官员胡安•卢布罗特说，这明显是由候鸟迁徙造成的。
The number of cases has been rising again since 2008, apparently because of migratory bird movements, Juan Lubroth, the UN's Food and Agriculture Organization (FAO) chief veterinary officer, said.
2008年以来，禽流感病例持续增加。据联合国粮农组织高级兽医官员胡安•卢布罗特说，这明显是由候鸟迁徙造成的。
The number of cases has been rising again since 2008, apparently because of migratory bird movements, Juan Lubroth, the UN's Food and Agriculture Organization (FAO) chief veterinary officer, said.
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