Efficacy of face masks, neck gaiters and face shields for reducing the expulsion of simulated cough-generated aerosols
| Autor: | Lindsley, William G., Blachere, Francoise M., Law, Brandon F., Beezhold, Donald H., Noti, John D. |
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| Rok vydání: | 2021 |
| Předmět: |
Face shield
2019-20 coronavirus outbreak business.product_category 010504 meteorology & atmospheric sciences Coronavirus disease 2019 (COVID-19) Computer science business.industry Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) 010501 environmental sciences 01 natural sciences Pollution Article Cotton cloth Face masks Medicine Environmental Chemistry General Materials Science Computer vision Artificial intelligence Respirator business Single layer Biomedical engineering 0105 earth and related environmental sciences |
| Zdroj: | Aerosol Sci Technol Aerosol Science and Technology |
| ISSN: | 1521-7388 0278-6826 |
| Popis: | Face masks are recommended to reduce community transmission of SARS-CoV-2. One of the primary benefits of face masks and other coverings is as source control devices to reduce the expulsion of respiratory aerosols during coughing, breathing, and speaking. Face shields and neck gaiters have been proposed as an alternative to face masks, but information about face shields and neck gaiters as source control devices is limited. We used a cough aerosol simulator with a pliable skin headform to propel small aerosol particles (0 to 7 μm) into different face coverings. An N95 respirator blocked 99% (standard deviation (SD) 0.3%) of the cough aerosol, a medical grade procedure mask blocked 59% (SD 6.9%), a 3-ply cotton cloth face mask blocked 51% (SD 7.7%), and a polyester neck gaiter blocked 47% (SD 7.5%) as a single layer and 60% (SD 7.2%) when folded into a double layer. In contrast, the face shield blocked 2% (SD 15.3%) of the cough aerosol. Our results suggest that face masks and neck gaiters are preferable to face shields as source control devices for cough aerosols. |
| Databáze: | OpenAIRE |
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