新型肺炎戴口罩一定要N95的才有效吗 新冠肺炎必须带医用口罩吗

社会热点2023-04-24 00:35:58未知

  建议:KN95不是所有人都必须佩戴的,不同的情形及不同的人群采用口罩可以参考下图

  

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