Influenza is basically an extreme upper respiratory infection, and, by itself, is rarely fatal.

流感基本上是极端的上呼吸道的感染，它本身很少是致命的。

youdao

Influenza is basically an extreme upper respiratory infection, and, by itself, is rarely fatal.

流感基本上是极端的上呼吸道的感染，它本身很少是致命的。

youdao