Measurement of filtration efficiencies of healthcare and consumer materials using modified respirator fit tester setup

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Abstract

During the current SARS-CoV-2 pandemic there is unprecedented demand for personal protective equipment (PPE), especially N95 respirators and surgical masks. The ability of SARS-CoV-2 to be transmitted via respiratory droplets from asymptomatic individuals has necessitated increased usage of both N95 respirators in the healthcare setting and masks (both surgical and homemade) in public spaces. These precautions rely on two fundamental principles of transmission prevention: particle filtration and droplet containment. The former is the focus of NIOSH N95 testing guidelines, and the latter is an FDA guideline for respirators and surgical masks. While studies have investigated droplet containment to provide guidance for homemade mask production, limited work has been done to characterize the filtration efficiency (FE) of materials used in home mask making. In this work, we demonstrate the low-cost (

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Long, K. D., Woodburn, E. V., Berg, I. C., Chen, V., & Scott, W. S. (2020). Measurement of filtration efficiencies of healthcare and consumer materials using modified respirator fit tester setup. PLoS ONE, 15(10 October). https://doi.org/10.1371/journal.pone.0240499

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