一些感染没有产生症状，对流感样疾病的快速排查很难捕捉到这些感染。
Some infections produced no symptoms, and quick surveys of influenza-like illness will not capture these infections.
一些感染没有产生症状，对流感样疾病的快速排查很难捕捉到这些感染。
Some infections produced no symptoms, and quick surveys of influenza -like illness will not capture these infections.
一些感染没有产生症状，对流感样疾病的快速排查很难捕捉到这些感染。
Some infections produced no symptoms, and quick surveys of influenza -like illness will not capture these infections.
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