Two masks can be worse than one: N95 respirator failure caused by an overlying face mask

We have demonstrated the effect of covering an N95 filtering facepiece respirator (FFR) with an overlying face mask. In total, 100 participants successfully completed quantitative fit testing wearing a 3M 1870+ FFR. Among them, 13 (13%; 95% CI, 7%–22%) failed subsequent fit testing when simultaneous...

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Bibliographic Details
Published in:Infection control and hospital epidemiology 2023-09, Vol.44 (9), p.1529-1531
Main Authors: Mueller, Jeffrey T., Geyer, Holly D., Karimi, Soroor, Poterack, Karl A., Seville, Maria Teresa A., Buckner Petty, Skye, Tipton, Steven M.
Format: Article
Language:English
Subjects:
Concise Communication
Coronaviruses
COVID-19
Disease control
Disease transmission
Masks
Occupational health
Prevention
Protective equipment
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Summary:We have demonstrated the effect of covering an N95 filtering facepiece respirator (FFR) with an overlying face mask. In total, 100 participants successfully completed quantitative fit testing wearing a 3M 1870+ FFR. Among them, 13 (13%; 95% CI, 7%–22%) failed subsequent fit testing when simultaneously wearing a Halyard 47117 procedural mask over the FFR.
ISSN:0899-823X
1559-6834
DOI:10.1017/ice.2022.277