[KongchangAI]
Unverified85% confidenceCautionTime unknown

不建议孕妇选择带呼气阀的口罩,呼气阀虽降低呼吸阻力更舒适,但会向外排出未过滤气体,在需双向防护的公共场合起不到保护他人及降低交叉感染的作用

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85%
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Long-term
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