The largest outbreak of avian influenza ever to occur has been causing sickn

游客2023-12-30 36

问题 The largest outbreak of avian influenza ever to occur has been causing sickness and death among birds in Southeast Asia since late 2003. The H5N1 influenza virus that has caused the death or destruction of more than 150 million birds now has appeared in areas as distant from Southeast Asia as Turkey and Croatia. The virus also has some capability to infect humans, with 121 cases reported in four nations, resulting in 62 fatalities. Health authorities warn that if the virus becomes contagious among humans, a flu pandemic could result, with the potential to cause millions of deaths globally.

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答案自2003年年底以来，东南亚地区暴发了有史以来规模最大的禽流感，导致大批禽鸟染病或死亡。H5N1型流感病毒已造成超过1．5亿只禽鸟死亡或遭扑杀，现在看来已经传播到与东南亚地区相距遥远的土耳其和克罗地亚等地。这种病毒还具有某种导致人体感染的能力。已有4个国家呈报了121例人体感染的病例，其中62人已经死亡。卫生官员警告说，病毒一旦开始在人体间传播，就可能引发大规模流感，并有可能在全球各地造成数百万人死亡。

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