Previous meta‐analyses concluded that there was insufficient evidence to determine the effect of N95 respirators. We aimed to assess the effectiveness of N95 respirators versus surgical masks for prevention of influenza by collecting randomized controlled trials (RCTs).

中文翻译：

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N95防毒面具与外科口罩防流感的有效性：系统评价和荟萃分析。

先前的荟萃分析得出的结论是，没有足够的证据确定N95呼吸器的效果。我们旨在通过收集随机对照试验（RCT）来评估N95呼吸器与手术口罩在预防流感方面的有效性。