Objective: The successful management of an influenza pandemic will be reliant on the
expertise of healthcare workers at high risk for occupationally acquired influenza …

Context Data about the effectiveness of the surgical mask compared with the N95 respirator
for protecting health care workers against influenza are sparse. Given the likelihood that …

Objective We aimed to examine the efficacy of medical masks and respirators in protecting
against respiratory infections using pooled data from two homogenous randomised control …

Background: Conflicting recommendations exist related to which facial protection should be
used by health care workers to prevent transmission of acute respiratory infections, including …

Objective Previous meta‐analyses concluded that there was insufficient evidence to
determine the effect of N95 respirators. We aimed to assess the effectiveness of N95 …

Importance Clinical studies have been inconclusive about the effectiveness of N95
respirators and medical masks in preventing health care personnel (HCP) from acquiring …

Objective To determine the effect of mask use on viral respiratory infection risk. Data sources
MEDLINE and the Cochrane Library. Study selection Randomized controlled trials (RCTs) …

BACKGROUND: Most surgical masks are not certified for use as respiratory protective
devices (RPDs). In the event of an influenza pandemic, logistical and practical implications …

Please cite this paper as: MacIntyre et al.(2011) A cluster randomized clinical trial comparing
fit‐tested and non‐fit‐tested N95 respirators to medical masks to prevent respiratory virus …

Background Respiratory protective devices are critical in protecting against infection in
healthcare workers at high risk of novel 2019 coronavirus disease (COVID‐19); however …