Herd protection effect of N95 respirators in healthcare workers
2017
ObjectiveTo determine if there was herd protection conferred to unprotected healthcare workers (HCWs) by N95 respirators worn by colleagues.MethodsData were analysed from a prospective cluster randomized clinical trial conducted in Beijing, China between 1 December 2008 and 15 January 2009. A minimum compliance level (MCL) of N95 respirators for prevention of clinical respiratory illness (CRI) was set based on various compliance cut-offs. The CRI rates were compared between compliant (≥MCL) and non-compliant (
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