中国西部地区的一位卫生官员周二说，当地一所学校爆发了B型流感，不是高致病性猪流感，学校随后关闭。

A school in western China was shut down after an outbreak of Type B influenza, a local health official said Tuesday, not the more lethal swine flu.

youdao

中国西部地区的一位卫生官员周二说，当地一所学校爆发了B型流感，不是高致病性猪流感，学校随后关闭。

A school in western China was shut down after an outbreak of Type B influenza, a local health official said Tuesday, not the more lethal swine flu.

youdao