这种疫苗对流感的免疫效力时间较长。

The vaccine provides longer immunity against flu.

《牛津词典》

流感的传染性很高。

Flu is highly infectious.

《牛津词典》

youdao

So, this is a cell that's infected with a microorganism, it's infected with a virus, let's say it's infected with influenza virus.

这是一个感染了微生物的细胞,它感染了一种病毒,就说是感染了流感病毒吧

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You've got the flu, you've got influenza in your upper respiratory tract, your cells are making more influenza.

你就此得了流感,你得了上呼吸道流感,你的细胞正在制造更多流感病毒

耶鲁公开课 - 生物医学工程探索课程节选

That's not meant to be a bad word but suggests being influenced, one might say, in the sense of "open the window and influenza," by those signs that precede it.

这不是个不好的词，只是想要表达影响的意思，人们可能说将一个符号之前的符号称作是“,“打开了窗户，引发了流感“

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