Proceedings of the National Academy of Sciences - PNAS, 2020-06, Vol.117 (22), p.11875-11877
2020
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- Autor(en) / Beteiligte
- Titel
- The airborne lifetime of small speech droplets and their potential importance in SARS-CoV-2 transmission
- Ist Teil von
- Proceedings of the National Academy of Sciences - PNAS, 2020-06, Vol.117 (22), p.11875-11877
- Ort / Verlag
- United States: National Academy of Sciences
- Erscheinungsjahr
- 2020
- Quelle
- Free E-Journal (出版社公開部分のみ）
- Beschreibungen/Notizen
- 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.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0027-8424eISSN: 1091-6490DOI: 10.1073/pnas.2006874117Titel-ID: cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_7275719
- Format
- –
- Schlagworte
- Air Microbiology, Asymptomatic, Betacoronavirus - physiology, Biological Sciences, BRIEF REPORT, Confined spaces, Coronavirus Infections - transmission, Coronaviruses, COVID-19, Dehydration, Disease control, Disease transmission, Droplets, Dynamic Light Scattering, Fomites - virology, Humans, Light scattering, Pandemics, Particle Size, Pneumonia, Viral - transmission, Saliva - chemistry, Saliva - virology, SARS Virus, SARS-CoV-2, Severe acute respiratory syndrome, Severe acute respiratory syndrome coronavirus 2, Speech, Viral diseases, Viral Load, Viruses