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Article: Short-range airborne route dominates exposure of respiratory infection during close contact

TitleShort-range airborne route dominates exposure of respiratory infection during close contact
Authors
KeywordsClose contact
Disease transmission
Exposure
Large droplet
Short-range airborne
Issue Date1-Jun-2020
PublisherElsevier
Citation
Building and Environment, 2020, v. 176 How to Cite?
Abstract

A susceptible person experiences the highest exposure risk of respiratory infection when he or she is in close proximity with an infected person. The large droplet route has been commonly believed to be dominant for most respiratory infections since the early 20th century, and the associated droplet precaution is widely known and practiced in hospitals and in the community. The mechanism of exposure to droplets expired at close contact, however, remains surprisingly unexplored. In this study, the exposure to exhaled droplets during close contact (<2 m) via both the short-range airborne and large droplet sub-routes is studied using a simple mathematical model of expired flows and droplet dispersion/deposition/inhalation, which enables the calculation of exposure due to both deposition and inhalation. The short-range airborne route is found to dominate at most distances studied during both talking and coughing. The large droplet route only dominates when the droplets are larger than 100 μm and when the subjects are within 0.2 m while talking or 0.5 m while coughing. The smaller the exhaled droplets, the more important the short-range airborne route. The large droplet route contributes less than 10% of exposure when the droplets are smaller than 50 μm and when the subjects are more than 0.3 m apart, even while coughing.


Persistent Identifierhttp://hdl.handle.net/10722/339958
ISSN
2023 Impact Factor: 7.1
2023 SCImago Journal Rankings: 1.647
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorChen, W-
dc.contributor.authorZhang, N-
dc.contributor.authorWei, J-
dc.contributor.authorYen, HL-
dc.contributor.authorLi, Y-
dc.date.accessioned2024-03-11T10:40:37Z-
dc.date.available2024-03-11T10:40:37Z-
dc.date.issued2020-06-01-
dc.identifier.citationBuilding and Environment, 2020, v. 176-
dc.identifier.issn0360-1323-
dc.identifier.urihttp://hdl.handle.net/10722/339958-
dc.description.abstract<p>A susceptible person experiences the highest exposure risk of respiratory infection when he or she is in <a href="https://www.sciencedirect.com/topics/engineering/close-proximity" title="Learn more about close proximity from ScienceDirect's AI-generated Topic Pages">close proximity</a> with an infected person. The large droplet route has been commonly believed to be dominant for most respiratory infections since the early 20th century, and the associated droplet precaution is widely known and practiced in hospitals and in the community. The mechanism of exposure to droplets expired at close contact, however, remains surprisingly unexplored. In this study, the exposure to exhaled droplets during close contact (<2 m) via both the short-range airborne and large droplet sub-routes is studied using a simple mathematical model of expired flows and droplet dispersion/deposition/inhalation, which enables the calculation of exposure due to both deposition and inhalation. The short-range airborne route is found to dominate at most distances studied during both talking and coughing. The large droplet route only dominates when the droplets are larger than 100 μm and when the subjects are within 0.2 m while talking or 0.5 m while coughing. The smaller the exhaled droplets, the more important the short-range airborne route. The large droplet route contributes less than 10% of exposure when the droplets are smaller than 50 μm and when the subjects are more than 0.3 m apart, even while coughing.<br></p>-
dc.languageeng-
dc.publisherElsevier-
dc.relation.ispartofBuilding and Environment-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectClose contact-
dc.subjectDisease transmission-
dc.subjectExposure-
dc.subjectLarge droplet-
dc.subjectShort-range airborne-
dc.titleShort-range airborne route dominates exposure of respiratory infection during close contact-
dc.typeArticle-
dc.identifier.doi10.1016/j.buildenv.2020.106859-
dc.identifier.scopuseid_2-s2.0-85083036630-
dc.identifier.volume176-
dc.identifier.eissn1873-684X-
dc.identifier.isiWOS:000536427800013-
dc.identifier.issnl0360-1323-

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