Peak risk of SARS-CoV-2 infection within 5 s of face-to-face encounters: an observational/retrospective study.
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
16 10 2023
16 10 2023
Historique:
received:
14
09
2023
accepted:
13
10
2023
medline:
23
10
2023
pubmed:
17
10
2023
entrez:
16
10
2023
Statut:
epublish
Résumé
The link between aerosol dynamics and viral exposure risk is not fully understood, particularly during movement and face-to-face interactions. To investigate this, we employed Particle Trace Velocimetry with a laser sheet and a high-speed camera to measure microparticles from a human mannequin's mouth. The average peak time in the non-ventilated condition (expiratory volume, 30 L; passing speed, 5 km/h) was 1.33 s (standard deviation = 0.32 s), while that in the ventilated condition was 1.38 s (standard deviation = 0.35 s). Our results showed that the peak of viral exposure risk was within 5 s during face-to-face encounters under both ventilated and non-ventilated conditions. Moreover, the risk of viral exposure greatly decreased in ventilated conditions compared to non-ventilated conditions. Based on these findings, considering a risk mitigation strategy for the duration of 5 s during face-to-face encounters is expected to significantly reduce the risk of virus exposure in airborne transmission.
Identifiants
pubmed: 37845540
doi: 10.1038/s41598-023-44967-x
pii: 10.1038/s41598-023-44967-x
pmc: PMC10579401
doi:
Types de publication
Observational Study
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
17520Informations de copyright
© 2023. Springer Nature Limited.
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