Dudalski N, et al. Experimental Investigation of Far Field Human Cough Airflows from Healthy and: Influenza-Infected Subjects. Indoor Air. 2020 Apr 18
Seasonal influenza epidemics have been responsible for causing increased economic expenditures and many deaths worldwide. Evidence exists to support the claim that the virus can be spread through the air, but the relative significance of airborne transmission has not been well-defined. Particle image velocimetry (PIV) and hot-wire anemometry (HWA) measurements were conducted at 1 m away from the mouth of human subjects to develop a model for cough flow behaviour at greater distances from the mouth than were studied previously. Biological aerosol sampling was conducted to assess the risk of exposure to airborne viruses. Throughout the investigation 77 experiments were conducted from 58 different subjects. From these subjects, 21 presented with influenza like illness. Of these, 12 subjects had laboratory confirmed respiratory infections. A model was developed for the cough centre-line velocity magnitude time history. The experimental results were also used to validate computational fluid dynamics (CFD) models. The peak velocity observed at the cough jet centre, averaged across all trials was 1.2 m/s, and an average jet spread angle of θ=24° was measured, similar to that of a steady free jet. No differences were observed in the velocity or turbulence characteristics between coughs from sick, convalescent or healthy participants.
See Also:
Latest articles in those days:
- Evolutionary Events Promoted Polymerase Activity of H13N8 Avian Influenza Virus 13 hours ago
- Cross-Species Transmission Potential of H4 Avian Influenza Viruses in China: Epidemiological and Evolutionary Study 13 hours ago
- Wild Bird-Origin H6N2 Influenza Virus Acquires Enhanced Pathogenicity after Single Passage in Mice 13 hours ago
- Genetics of H5N1 and H5N8 High-Pathogenicity Avian Influenza Viruses Isolated in Japan in Winter 2021-2022 13 hours ago
- Avian H6 Influenza Viruses in Vietnamese Live Bird Markets during 2018-2021 13 hours ago
[Go Top] [Close Window]