Risk assessment of airborne transmission of COVID-19 by asymptomatic individuals under different practical settings

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 numerical simulations, we quantify the exhaled particles from normal respiratory beha...

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Published in:arXiv.org 2020-07
Main Authors: Shao, Siyao, Zhou, Dezhi, He, Ruichen, Li, Jiaqi, Zou, Shufan, Mallery, Kevin, Kumar, Santosh, Yang, Suo, Hong, Jiarong
Format: Article
Language:English
Subjects:
Aerosols
Asymptomatic
Breathing
Computer simulation
Coronaviruses
COVID-19
Disease transmission
In situ measurement
Risk assessment
Viruses
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container_title arXiv.org
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creator Shao, Siyao
Zhou, Dezhi
He, Ruichen
Li, Jiaqi
Zou, Shufan
Mallery, Kevin
Kumar, Santosh
Yang, Suo
Hong, Jiarong
description 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 numerical 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 substantial fraction of crystalline particles from normal breathing and its strong correlation with breathing depth.
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source Publicly Available Content Database (Proquest) (PQ_SDU_P3); Coronavirus Research Database
subjects Aerosols
Asymptomatic
Breathing
Computer simulation
Coronaviruses
COVID-19
Disease transmission
In situ measurement
Risk assessment
Viruses
title Risk assessment of airborne transmission of COVID-19 by asymptomatic individuals under different practical settings
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