Ville Vourinen, Mia Aarnio, Mikko Alava, Ville Alopaeus, Nina Atanasova, Miko Auvinen, Nallannan Balasubramanian, Hadi Bordbar, Panu Erosto, Rafael Grande, Nick Hayward, Antti Hellsten, Simo Hostikka, Jyrki Hokkanenb, ossi Kaario, Aku Karvinen, Ilkka Kivisto, Marko Korhonen… Monika Osterberg

Published In Safety Science

Volume 130, October 2020, 104866


“In this work we have modeled physical processes related to aerosol dispersion in air and focused on transmission by inhalation in the context of COVID-19. In large scope, such modeling efforts have relevance to the build-up of statistical metrics such as . By May 2020, the general consensus starts to be that the SARS-CoV-2 virus does spread, not only by contact transmission, but also by inhalation of large enough numbers of airborne viral particles. In fact, the study by van Doremalen et al. (2020) incidates that the SARS-CoV-2 virus may remain infectious as an aerosol for at least 3 h. Since the concepts of droplet transmission and airborne transmission are ambiguous and person/discipline dependent, we propose that the concept ’transmission by inhalation’ would better serve the purpose of communicating how infectious diseases could spread…

The most important consequence of the synthesized literature and numerical observations is that, with high level of certainty, it can be concluded that a major part of droplets of respiratory origin stay airborne for long enough time for them to be inhaled. This is true even without assuming droplet drying, and particularly true when the drying is taken into account.”

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