The virulent H5N1 avian flu virus spread across much of Asia from late 2003, causing the death or culling of more than 100 million fowl.

这种致命的H5N1禽流感病毒于2003年底席卷了亚洲大部分地区，导致超过1亿的家禽死亡或被扑杀。

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The virulent H5N1 avian flu virus spread across much of Asia from late 2003, causing the death or culling of more than 100 million fowl.

这种致命的H5N1禽流感病毒于2003年底席卷了亚洲大部分地区，导致超过1亿的家禽死亡或被扑杀。

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