HPAI spreads more rapidly than LPAI and has a higher death rate in birds.

HPAI传播的速度比LPAI快很多，并且引起鸟类较高的死亡率。

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These samples were collected from apparently healthy ducks and initial test results indicate the presence of low pathogenic avian influenza (LPAI) virus, which poses no threat to human health.

这些样本是从外观正常的鸭群中间抽取的，初次调查表明其中含有低致病禽流感病毒，该病毒对人体健康没有威胁。

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