大流行疫情就是一种新的传染性疾病爆发，它会导致严重症状，并在一个以上地理区内进行人与人之前的广泛传染。
A pandemic is an outbreak of a new infectious disease, which causes serious illness and spreads widely from person to person across more than one geographical region.
对于那些该病毒正在社区内广泛传播的地区而言，临床医生见到出现流感样病症的病人，就应将大流行性病毒假定为病因。
In areas where the virus is circulating widely in the community, clinicians seeing patients with influenza-like illness should assume that the pandemic virus is the cause.
这些定义载于1999年、2005年和2009年发表的大流行防备广泛指南中。
These definitions were contained in broader guidelines for pandemic preparedness issued in 1999, 2005 and 2009.
大流行危险的程度取决于H5N1如何在家禽中广泛传播、病毒多久传播给人以及同时发生的人类流感病毒的传播。
The level of pandemic risk depends on how widespread H5N1 is in domestic poultry, how often the virus is transmitted to humans, and the concurrent circulation of human influenza viruses.
流感大流行由全新的一种流感病毒或最近未在人群中广泛流行的一种流感病毒引起，几乎无人对其有免疫力。
An influenza pandemic is caused by a virus that is either entirely new or has not circulated recently and widely in the human population. This creates an almost universal vulnerability to infection.
如果我们没有准备，下一次大流行将给人类带来不可估量的苦难，一方面直接来自于人们生命的损失，另一方面间接地来自于其对安全产生的广泛影响。
If we are unprepared, the next pandemic will cause incalculable human misery. Both directly from the loss of human life, and indirectly through its widespread impact on security.
到目前为止，对神经氨酸酶抑制剂的抗病毒制剂耐药性，在临床上很微弱，但在大流行期间广泛使用这类抑制剂时可能会出现。
Antiviral resistance to neuraminidase inhibitors has been clinically negligible so far but is likely to be detected during widespread use during a pandemic.
由于人们缺乏对新毒株的免疫力，流感大流行会对包括年轻人群在内的更广泛人群产生甚至更大的影响3,4。
Influenza pandemics can have an even bigger impact in the wider population, including younger age groups, because of a lack of population immunity to the new strain.
过去发生大流行时，流感病毒的传播需要六个多月才能达到新型H1N1病毒在过去不到六个星期内传播的广泛程度。
In past pandemics, influenza viruses have needed more than six months to spread as widely as the new H1N1 virus has spread in less than six weeks.
世卫组织的大流行分级以新病毒传播的广泛程度为基础。
The WHO's pandemic levels are based on how widely a novel flu virus is spreading.
世卫组织的大流行分级以新病毒传播的广泛程度为基础。
The WHO's pandemic levels are based on how widely a novel flu virus is spreading.
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