H5N1 is a particular subtype of the avian influenza a virus, and is the current cause of bird flu in a number of countries.

H5N1是禽流感A型病毒的一个特殊亚种，目前是许多国家禽流感的元凶。

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It is an infection caused by the avian influenza a virus, thought to originate from wild water-birds who can carry the virus without showing any symptoms of sickness.

它是禽流感A型病毒造成的一种感染，该病毒被认为是缘于野生水禽，但携带该病毒的这些水禽并不表现任何病症。

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The Ministry of Health of Indonesia has announced a confirmed case of human infection with avian influenza a (H5N1) virus.

印度尼西亚卫生部宣布发生了一起新的人感染甲型H5N1禽流感病毒确诊病例。

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Health officials in Mexico and the United States were puzzled by a virus that combined elements of swine, avian and human influenza.

VOA: standard.2009.12.25

According to Dr. Ron Fouchier, a Dutch virologist, this mutation allows the virus to reproduce at much lower temperatures than a standard avian influenza virus.

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Flavonoids and flu: Two plant-based flavonoids disease-fighting compounds found in many foods significantly impaired the infectious activity of H5N1 avian-flu virus in laboratory experiments and may form the basis of future influenza treatments, a report in Antiviral Research says.

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The new virus has genes from North American swine influenza, avian influenza, human influenza and a form of swine influenza normally found in Asia and Europe, said Nancy Cox, chief of the CDC's Influenza Division.

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