The effects of indoor temperature and humidity on local transmission of COVID-19 and how it relates to global trends.

During the COVID-19 pandemic, analyses on global data have not reached unanimous consensus on whether warmer and humid weather curbs the spread of the SARS-CoV-2 virus. We conjectured that this lack of consensus is due to the discrepancy between global environmental data such as temperature and humi...

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Main Authors: Han June Park, Sung-Gwang Lee, Jeong Suk Oh, Minhyuk Nam, Steven Barrett, Soohyung Lee, Wontae Hwang
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2022-01-01
Series:PLoS ONE
Online Access:https://doi.org/10.1371/journal.pone.0271760
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author Han June Park
Sung-Gwang Lee
Jeong Suk Oh
Minhyuk Nam
Steven Barrett
Soohyung Lee
Wontae Hwang
author_facet Han June Park
Sung-Gwang Lee
Jeong Suk Oh
Minhyuk Nam
Steven Barrett
Soohyung Lee
Wontae Hwang
author_sort Han June Park
collection DOAJ
description During the COVID-19 pandemic, analyses on global data have not reached unanimous consensus on whether warmer and humid weather curbs the spread of the SARS-CoV-2 virus. We conjectured that this lack of consensus is due to the discrepancy between global environmental data such as temperature and humidity being collected outdoors, while most infections have been reported to occur indoors, where conditions can be different. Thus, we have methodologically investigated the effect of temperature and relative humidity on the spread of expired respiratory droplets from the mouth, which are assumed to be the main cause of most short-range infections. Calculating the trajectory of individual droplets using an experimentally validated evaporation model, the final height and distance of the evaporated droplets is obtained, and then correlated with global COVID-19 spread. Increase in indoor humidity is associated with reduction in COVID-19 spread, while temperature has no statistically significant effect.
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spelling doaj.art-ef96a833edca430c864e85ecc207a1512022-12-22T04:19:07ZengPublic Library of Science (PLoS)PLoS ONE1932-62032022-01-01178e027176010.1371/journal.pone.0271760The effects of indoor temperature and humidity on local transmission of COVID-19 and how it relates to global trends.Han June ParkSung-Gwang LeeJeong Suk OhMinhyuk NamSteven BarrettSoohyung LeeWontae HwangDuring the COVID-19 pandemic, analyses on global data have not reached unanimous consensus on whether warmer and humid weather curbs the spread of the SARS-CoV-2 virus. We conjectured that this lack of consensus is due to the discrepancy between global environmental data such as temperature and humidity being collected outdoors, while most infections have been reported to occur indoors, where conditions can be different. Thus, we have methodologically investigated the effect of temperature and relative humidity on the spread of expired respiratory droplets from the mouth, which are assumed to be the main cause of most short-range infections. Calculating the trajectory of individual droplets using an experimentally validated evaporation model, the final height and distance of the evaporated droplets is obtained, and then correlated with global COVID-19 spread. Increase in indoor humidity is associated with reduction in COVID-19 spread, while temperature has no statistically significant effect.https://doi.org/10.1371/journal.pone.0271760
spellingShingle Han June Park
Sung-Gwang Lee
Jeong Suk Oh
Minhyuk Nam
Steven Barrett
Soohyung Lee
Wontae Hwang
The effects of indoor temperature and humidity on local transmission of COVID-19 and how it relates to global trends.
PLoS ONE
title The effects of indoor temperature and humidity on local transmission of COVID-19 and how it relates to global trends.
title_full The effects of indoor temperature and humidity on local transmission of COVID-19 and how it relates to global trends.
title_fullStr The effects of indoor temperature and humidity on local transmission of COVID-19 and how it relates to global trends.
title_full_unstemmed The effects of indoor temperature and humidity on local transmission of COVID-19 and how it relates to global trends.
title_short The effects of indoor temperature and humidity on local transmission of COVID-19 and how it relates to global trends.
title_sort effects of indoor temperature and humidity on local transmission of covid 19 and how it relates to global trends
url https://doi.org/10.1371/journal.pone.0271760
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