Unlike typical flus, which usually hit the old and weak, the young and healthy appear to be falling victim to this new disease.

年轻健康的人似乎成为了这种新病毒的易感人群，而不像普通的流感病毒那样，通常是年老体衰的人感染。

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The old and weak people easily catch the flu.

年老体弱的人容易患流感。

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The old and weak people easily catch the flu.

年老体弱的人容易患流感。

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