研究者发现，猪流感病毒比普通流感在肺更深部结合，这可以解释为什么它有时是致命的原因。

Researchers discover that the swine flu virus binds far deeper in the lungs than ordinary flu, possibly explaining why it is sometimes fatal.

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普通流感也不可小视。

And "ordinary" flu is not to be taken lightly.

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猪流感症状和普通流感症状一样。

The symptoms are like regular flu. You've got it if you've got a fever.

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