Unverified90% confidenceTradeoffTime unknown

防护等级越高越透气性越差：KN95/N95级儿童口罩过滤达95%但呼吸阻力大，孩子易憋闷抗拒，日常通勤和上学选卫生级或普通防护级（过滤90%）更利于长时间配合佩戴

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90%

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Long-term

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Unverified防护等级越高（F级）过滤效率越好但透气性越差，儿童易憋闷抗拒佩戴；日常D级卫生型透气佩戴时间可更长，实际防护效果反而因佩戴依从性更高86% similar Unverified儿童不应佩戴成人N95，尺寸过大导致边缘泄漏防护失效，且呼吸阻力可能超过儿童肺活量负荷；应选儿童专用尺寸(S/XS)且执行GB/T38880儿童口罩标准79% similar Unverified3岁以下婴幼儿禁止佩戴任何密闭型口罩，气道细窄佩戴防护口罩会导致呼吸困难甚至窒息，应通过减少外出、成人防护等方式间接保护75% similar

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