How much natural ventilation rate can suppress COVID-19 transmission in occupancy zones?
| Autor: | Nejatian A; Department of Civil Engineering, Sharif University of Technology, Tehran, Iran., Sadabad FE; Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA., Shirazi FM; Arizona Poison and Drug Information Center, University of Arizona College of Medicine Tucson, Arizona, USA., Nejati SF; Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA., Nakhaee S; Medical Toxicology and Drug Abuse Research Center, Birjand University of Medical Sciences, Birjand, Iran., Mehrpour O; Medical Toxicology and Drug Abuse Research Center, Birjand University of Medical Sciences, Birjand, Iran.; Michigan Poison and Drug Information Center, Wayne State University School of Medicine, Detroit, MI, USA. |
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| Jazyk: | angličtina |
| Zdroj: | Journal of research in medical sciences : the official journal of Isfahan University of Medical Sciences [J Res Med Sci] 2024 Feb 23; Vol. 28, pp. 84. Date of Electronic Publication: 2024 Feb 23 (Print Publication: 2023). |
| DOI: | 10.4103/jrms.jrms_796_22 |
| Abstrakt: | Background: Previous research has emphasized the importance of efficient ventilation in suppressing COVID-19 transmission in indoor spaces, yet suitable ventilation rates have not been suggested. Materials and Methods: This study investigated the impacts of mechanical, natural, single-sided, cross-ventilation, and three mask types (homemade, surgical, N95) on COVID-19 spread across eight common indoor settings. Viral exposure was quantified using a mass balance calculation of inhaled viral particles, accounting for initial viral load, removal via ventilation, and mask filtration efficiency. Results: Results demonstrated that natural cross-ventilation significantly reduced viral load, decreasing from 10,000 to 0 viruses over 15 minutes in a 100 m2 space by providing ~1325 m3/h of outdoor air via two 0.6 m2 openings at 1.5 m/s wind speed. In contrast, single-sided ventilation only halved viral load at best. Conclusion: Natural cross-ventilation with masks effectively suppressed airborne viruses, lowering potential infections and disease transmission. The study recommends suitable ventilation rates to reduce COVID-19 infection risks in indoor spaces. Competing Interests: There are no conflicts of interest. (Copyright: © 2024 Journal of Research in Medical Sciences.) |
| Databáze: | MEDLINE |
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