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Student close contact behavior and COVID-19 transmission in China's classrooms
Classrooms are high-risk indoor environments, so analysis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission in classrooms is important for determining optimal interventions. Due to the absence of human behavior data, it is challenging to accurately determine virus exposure...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10205473/ https://www.ncbi.nlm.nih.gov/pubmed/37228510 http://dx.doi.org/10.1093/pnasnexus/pgad142 |
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author | Guo, Yong Dou, Zhiyang Zhang, Nan Liu, Xiyue Su, Boni Li, Yuguo Zhang, Yinping |
author_facet | Guo, Yong Dou, Zhiyang Zhang, Nan Liu, Xiyue Su, Boni Li, Yuguo Zhang, Yinping |
author_sort | Guo, Yong |
collection | PubMed |
description | Classrooms are high-risk indoor environments, so analysis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission in classrooms is important for determining optimal interventions. Due to the absence of human behavior data, it is challenging to accurately determine virus exposure in classrooms. A wearable device for close contact behavior detection was developed, and we recorded >250,000 data points of close contact behaviors of students from grades 1 to 12. Combined with a survey on students' behaviors, we analyzed virus transmission in classrooms. Close contact rates for students were 37 ± 11% during classes and 48 ± 13% during breaks. Students in lower grades had higher close contact rates and virus transmission potential. The long-range airborne transmission route is dominant, accounting for 90 ± 3.6% and 75 ± 7.7% with and without mask wearing, respectively. During breaks, the short-range airborne route became more important, contributing 48 ± 3.1% in grades 1 to 9 (without wearing masks). Ventilation alone cannot always meet the demands of COVID-19 control; 30 m(3)/h/person is suggested as the threshold outdoor air ventilation rate in a classroom. This study provides scientific support for COVID-19 prevention and control in classrooms, and our proposed human behavior detection and analysis methods offer a powerful tool to understand virus transmission characteristics and can be employed in various indoor environments. |
format | Online Article Text |
id | pubmed-10205473 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-102054732023-05-24 Student close contact behavior and COVID-19 transmission in China's classrooms Guo, Yong Dou, Zhiyang Zhang, Nan Liu, Xiyue Su, Boni Li, Yuguo Zhang, Yinping PNAS Nexus Biological, Health, and Medical Sciences Classrooms are high-risk indoor environments, so analysis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission in classrooms is important for determining optimal interventions. Due to the absence of human behavior data, it is challenging to accurately determine virus exposure in classrooms. A wearable device for close contact behavior detection was developed, and we recorded >250,000 data points of close contact behaviors of students from grades 1 to 12. Combined with a survey on students' behaviors, we analyzed virus transmission in classrooms. Close contact rates for students were 37 ± 11% during classes and 48 ± 13% during breaks. Students in lower grades had higher close contact rates and virus transmission potential. The long-range airborne transmission route is dominant, accounting for 90 ± 3.6% and 75 ± 7.7% with and without mask wearing, respectively. During breaks, the short-range airborne route became more important, contributing 48 ± 3.1% in grades 1 to 9 (without wearing masks). Ventilation alone cannot always meet the demands of COVID-19 control; 30 m(3)/h/person is suggested as the threshold outdoor air ventilation rate in a classroom. This study provides scientific support for COVID-19 prevention and control in classrooms, and our proposed human behavior detection and analysis methods offer a powerful tool to understand virus transmission characteristics and can be employed in various indoor environments. Oxford University Press 2023-05-23 /pmc/articles/PMC10205473/ /pubmed/37228510 http://dx.doi.org/10.1093/pnasnexus/pgad142 Text en © The Author(s) 2023. Published by Oxford University Press on behalf of National Academy of Sciences. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited. For commercial re-use, please contact journals.permissions@oup.com |
spellingShingle | Biological, Health, and Medical Sciences Guo, Yong Dou, Zhiyang Zhang, Nan Liu, Xiyue Su, Boni Li, Yuguo Zhang, Yinping Student close contact behavior and COVID-19 transmission in China's classrooms |
title | Student close contact behavior and COVID-19 transmission in China's classrooms |
title_full | Student close contact behavior and COVID-19 transmission in China's classrooms |
title_fullStr | Student close contact behavior and COVID-19 transmission in China's classrooms |
title_full_unstemmed | Student close contact behavior and COVID-19 transmission in China's classrooms |
title_short | Student close contact behavior and COVID-19 transmission in China's classrooms |
title_sort | student close contact behavior and covid-19 transmission in china's classrooms |
topic | Biological, Health, and Medical Sciences |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10205473/ https://www.ncbi.nlm.nih.gov/pubmed/37228510 http://dx.doi.org/10.1093/pnasnexus/pgad142 |
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