TY - JOUR
T1 - Risk assessment of airborne transmission of COVID-19 by asymptomatic individuals under different practical settings
AU - Shao, Siyao
AU - Zhou, Dezhi
AU - He, Ruichen
AU - Li, Jiaqi
AU - Zou, Shufan
AU - Mallery, Kevin
AU - Kumar, Santosh
AU - Yang, Suo
AU - Hong, Jiarong
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/1
Y1 - 2021/1
N2 - The lack of quantitative risk assessment of airborne transmission of COVID-19 under practical settings leads to large uncertainties and inconsistencies in our preventive measures. Combining in situ measurements and computational fluid dynamics simulations, we quantify the exhaled particles from normal respiratory behaviors and their transport under elevator, small classroom, and supermarket settings to evaluate the risk of inhaling potentially virus-containing particles. Our results show that the design of ventilation is critical for reducing the risk of particle encounters. Inappropriate design can significantly limit the efficiency of particle removal, create local hot spots with orders of magnitude higher risks, and enhance particle deposition causing surface contamination. Additionally, our measurements reveal the presence of a substantial fraction of faceted particles from normal breathing and its strong correlation with breathing depth.
AB - The lack of quantitative risk assessment of airborne transmission of COVID-19 under practical settings leads to large uncertainties and inconsistencies in our preventive measures. Combining in situ measurements and computational fluid dynamics simulations, we quantify the exhaled particles from normal respiratory behaviors and their transport under elevator, small classroom, and supermarket settings to evaluate the risk of inhaling potentially virus-containing particles. Our results show that the design of ventilation is critical for reducing the risk of particle encounters. Inappropriate design can significantly limit the efficiency of particle removal, create local hot spots with orders of magnitude higher risks, and enhance particle deposition causing surface contamination. Additionally, our measurements reveal the presence of a substantial fraction of faceted particles from normal breathing and its strong correlation with breathing depth.
KW - Airborne transmission
KW - Digital inline holography
KW - Exhaled particles
KW - Particle contamination
KW - Ventilation
UR - http://www.scopus.com/inward/record.url?scp=85091210515&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85091210515&partnerID=8YFLogxK
U2 - 10.1016/j.jaerosci.2020.105661
DO - 10.1016/j.jaerosci.2020.105661
M3 - Article
C2 - 32968325
AN - SCOPUS:85091210515
SN - 0021-8502
VL - 151
JO - Journal of Aerosol Science
JF - Journal of Aerosol Science
M1 - 105661
ER -