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The airborne lifetime of small speech droplets and their potential importance in SARS-CoV-2 transmission
Speech droplets generated by asymptomatic carriers of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are increasingly considered to be a likely mode of disease transmission. Highly sensitive laser light scattering observations have revealed that loud speech can emit thousands of oral f...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
National Academy of Sciences
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7275719/ https://www.ncbi.nlm.nih.gov/pubmed/32404416 http://dx.doi.org/10.1073/pnas.2006874117 |
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author | Stadnytskyi, Valentyn Bax, Christina E. Bax, Adriaan Anfinrud, Philip |
author_facet | Stadnytskyi, Valentyn Bax, Christina E. Bax, Adriaan Anfinrud, Philip |
author_sort | Stadnytskyi, Valentyn |
collection | PubMed |
description | Speech droplets generated by asymptomatic carriers of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are increasingly considered to be a likely mode of disease transmission. Highly sensitive laser light scattering observations have revealed that loud speech can emit thousands of oral fluid droplets per second. In a closed, stagnant air environment, they disappear from the window of view with time constants in the range of 8 to 14 min, which corresponds to droplet nuclei of ca. 4 μm diameter, or 12- to 21-μm droplets prior to dehydration. These observations confirm that there is a substantial probability that normal speaking causes airborne virus transmission in confined environments. |
format | Online Article Text |
id | pubmed-7275719 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | National Academy of Sciences |
record_format | MEDLINE/PubMed |
spelling | pubmed-72757192020-06-11 The airborne lifetime of small speech droplets and their potential importance in SARS-CoV-2 transmission Stadnytskyi, Valentyn Bax, Christina E. Bax, Adriaan Anfinrud, Philip Proc Natl Acad Sci U S A Biological Sciences Speech droplets generated by asymptomatic carriers of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are increasingly considered to be a likely mode of disease transmission. Highly sensitive laser light scattering observations have revealed that loud speech can emit thousands of oral fluid droplets per second. In a closed, stagnant air environment, they disappear from the window of view with time constants in the range of 8 to 14 min, which corresponds to droplet nuclei of ca. 4 μm diameter, or 12- to 21-μm droplets prior to dehydration. These observations confirm that there is a substantial probability that normal speaking causes airborne virus transmission in confined environments. National Academy of Sciences 2020-06-02 2020-05-13 /pmc/articles/PMC7275719/ /pubmed/32404416 http://dx.doi.org/10.1073/pnas.2006874117 Text en Copyright © 2020 the Author(s). Published by PNAS. http://creativecommons.org/licenses/by/4.0/ https://creativecommons.org/licenses/by/4.0/This open access article is distributed under Creative Commons Attribution License 4.0 (CC BY) (http://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Biological Sciences Stadnytskyi, Valentyn Bax, Christina E. Bax, Adriaan Anfinrud, Philip The airborne lifetime of small speech droplets and their potential importance in SARS-CoV-2 transmission |
title | The airborne lifetime of small speech droplets and their potential importance in SARS-CoV-2 transmission |
title_full | The airborne lifetime of small speech droplets and their potential importance in SARS-CoV-2 transmission |
title_fullStr | The airborne lifetime of small speech droplets and their potential importance in SARS-CoV-2 transmission |
title_full_unstemmed | The airborne lifetime of small speech droplets and their potential importance in SARS-CoV-2 transmission |
title_short | The airborne lifetime of small speech droplets and their potential importance in SARS-CoV-2 transmission |
title_sort | airborne lifetime of small speech droplets and their potential importance in sars-cov-2 transmission |
topic | Biological Sciences |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7275719/ https://www.ncbi.nlm.nih.gov/pubmed/32404416 http://dx.doi.org/10.1073/pnas.2006874117 |
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