Results: The air bacterial count of the working areas of negative-pressure ward increased in the order of clean area-semicontaminated area-contaminated area (negative-pressure ward).

结果，负压病房工作区空气含菌量从清洁区-半污染区-污染区（负压病房）依次升高；

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To control the respiratory infection, some measures are taken such as ward negative pressure control, reasonable air distribution and high efficiency exhaust air filtration, obtaining better effects.

针对控制呼吸道传染病的要求，采用了房间负压控制、合理的气流分布、高效过滤排风等技术，取得了较好的效果。

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