Windows of Knowledge

Germ alert!

作者：21ST

甲型流感是可以预防的！全版词数 680 建议阅读时间 17分钟MORE and more people are worried about A(H1N1) flu.uSome schools even stop classes because some students have got it. What is A(H1N1) flu? Is it really that scary? Let's find out.

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