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- Alsved, MalinLund University,Lunds universitet,Metalund,Annan verksamhet, LTH,Lunds Tekniska Högskola,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Ergonomi och aerosolteknologi,Institutionen för designvetenskaper,Institutioner vid LTH,LTH profilområde: Aerosoler,LTH profilområden,Other operations, LTH,Faculty of Engineering, LTH,Other operations, LTH,Faculty of Engineering, LTH,Ergonomics and Aerosol Technology,Department of Design Sciences,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Aerosols,LTH Profile areas,Faculty of Engineering, LTH (author)
Size distribution of exhaled aerosol particles containing SARS-CoV-2 RNA
- Article/chapterEnglish2023
Publisher, publication year, extent ...
- 2022-11-04
- Informa UK Limited,2023
Numbers
- LIBRIS-ID:oai:lup.lub.lu.se:018867ed-2bd5-476d-aa87-39960ea5bdb8
- https://lup.lub.lu.se/record/018867ed-2bd5-476d-aa87-39960ea5bdb8URI
- https://doi.org/10.1080/23744235.2022.2140822DOI
Supplementary language notes
- Language:English
- Summary in:English
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- SwePubSwePub
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Notes
- Background: SARS-CoV-2 in exhaled aerosols is considered an important contributor to the spread of COVID-19. However, characterizing the size distribution of virus-containing aerosol particles has been challenging as high concentrations of SARS-CoV-2 in exhaled air is mainly present close to symptom onset. We present a case study of a person with COVID-19 who was able to participate in extensive measurements of exhaled aerosols already on the day of symptom onset and then for the following three days. Methods: Aerosol collection was performed using an eight-stage impactor while the subject was breathing, talking and singing, for 30 min each, once every day. In addition, nasopharyngeal samples, saliva samples, room air samples and information on symptom manifestations were collected every day. Samples were analyzed by RT-qPCR for detection of SARS-CoV-2 RNA. Results: SARS-CoV-2 RNA was detected in seven of the eight particle size fractions, from 0.34 to >8.1 µm, with the highest concentrations found in 0.94–2.8 µm particles. The concentration of SARS-CoV-2 RNA was highest on the day of symptom onset, and declined for each day thereafter. Conclusion: Our data showed that 90% of the exhaled SARS-CoV-2 RNA was found in aerosol particles <4.5 µm, indicating the importance of small particles for the transmission of COVID-19 close to symptom onset. These results are important for our understanding of airborne transmission, for developing accurate models and for selecting appropriate mitigation strategies.
Subject headings and genre
- MEDICIN OCH HÄLSOVETENSKAP Klinisk medicin Infektionsmedicin hsv//swe
- MEDICAL AND HEALTH SCIENCES Clinical Medicine Infectious Medicine hsv//eng
- cascade impactor
- COVID-19
- exhaled aerosol
- SARS-CoV-2
- size distribution
Added entries (persons, corporate bodies, meetings, titles ...)
- Nygren, DavidLund University,Lunds universitet,Translationell infektionsmedicin,Forskargrupper vid Lunds universitet,Translational infection medicine,Lund University Research Groups(Swepub:lu)da4505ny (author)
- Thuresson, SaraLund University,Lunds universitet,Metalund,Annan verksamhet, LTH,Lunds Tekniska Högskola,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Ergonomi och aerosolteknologi,Institutionen för designvetenskaper,Institutioner vid LTH,LTH profilområde: Aerosoler,LTH profilområden,Other operations, LTH,Faculty of Engineering, LTH,Other operations, LTH,Faculty of Engineering, LTH,Ergonomics and Aerosol Technology,Department of Design Sciences,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Aerosols,LTH Profile areas,Faculty of Engineering, LTH(Swepub:lu)sa3286th (author)
- Fraenkel, Carl JohanLund University,Lunds universitet,Infektionsmedicin,Sektion III,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Infection Medicine (BMC),Section III,Department of Clinical Sciences, Lund,Faculty of Medicine,Region Skåne(Swepub:lu)infe-cfr (author)
- Medstrand, PatrikLund University,Lunds universitet,Klinisk virologi, Malmö,Forskargrupper vid Lunds universitet,Clinical Virology, Malmö,Lund University Research Groups,Region Skåne(Swepub:lu)mmb-pme (author)
- Löndahl, JakobLund University,Lunds universitet,Metalund,Annan verksamhet, LTH,Lunds Tekniska Högskola,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Ergonomi och aerosolteknologi,Institutionen för designvetenskaper,Institutioner vid LTH,LTH profilområde: Aerosoler,LTH profilområden,LTH profilområde: Teknik för hälsa,Other operations, LTH,Faculty of Engineering, LTH,Other operations, LTH,Faculty of Engineering, LTH,Ergonomics and Aerosol Technology,Department of Design Sciences,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Aerosols,LTH Profile areas,Faculty of Engineering, LTH,LTH Profile Area: Engineering Health,Faculty of Engineering, LTH(Swepub:lu)desi-jlo (author)
- MetalundAnnan verksamhet, LTH (creator_code:org_t)
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- In:Infectious Diseases: Informa UK Limited55:2, s. 158-1632374-42352374-4243
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