Size, concentration, and origin of human exhaled particles and their dependence on human factors with implications on infection transmission

Understanding infection transmission between individuals, as well as evaluating the efficacy of protective measures, are key issues in pandemics driven by human respiratory particles. The key is a quantitative understanding of the size and concentration of particles exhaled and their variability acr...

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Bibliographic Details
Published in:Journal of aerosol science 2023-02, Vol.168, p.106102, Article 106102
Main Authors: Bagheri, Gholamhossein, Schlenczek, Oliver, Turco, Laura, Thiede, Birte, Stieger, Katja, Kosub, Jana M., Clauberg, Sigrid, Pöhlker, Mira L., Pöhlker, Christopher, Moláček, Jan, Scheithauer, Simone, Bodenschatz, Eberhard
Format: Article
Language:English
Subjects:
Aerosol
Airborne
Droplet
Infection prevention
Respiratory particle
Transmission risk
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Summary:Understanding infection transmission between individuals, as well as evaluating the efficacy of protective measures, are key issues in pandemics driven by human respiratory particles. The key is a quantitative understanding of the size and concentration of particles exhaled and their variability across the size range for a representative population of all ages, genders, and different activities. Here we present data from 132 healthy volunteers aged 5 to 80 years, measured over the entire particle size range for each individual. Conventional particle spectrometry was combined with in-line holography under well-controlled conditions for common activities such as breathing, speaking, singing, and shouting. We find age to be the most important parameter for the concentration of small exhale particles
ISSN:0021-8502
1879-1964
DOI:10.1016/j.jaerosci.2022.106102