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http://conacyt.repositorioinstitucional.mx/jspui/handle/1000/7588| Increased airborne transmission of COVID-19 with new variants. Implications for health policies. | |
| Bertrand R. Rowe Andre Canosa Amina Meslem Frantz Rowe | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| https://doi.org/10.1101/2022.01.13.22269234 | |
| https://www.medrxiv.org/content/10.1101/2022.01.13.22269234v1 | |
| The aim of the present paper is to highlight that new variants, either of higher viral load such as delta or higher contagiousness like omicron, lead to an even higher airborne transmission than historical strains. We first review the question of the route of contamination and of the dose following exposure, and the importance of the counting unit for pathogens, itself linked to the dose-response law. Using the counting unit of Wells, i.e. the quantum of contagium, we develop the conservation equation of quanta which allows deriving the value of the quantum concentration at steady state for a well-mixed room. With the choice of an exponential response function, this leads to the famous Wells-Riley equation. The analysis points out the importance of a number of parameters such as the time of exposure, the quantum production rate, mask wearing and the incidence rate in the population in order to evaluate the risk. The link with the monitoring concentration of carbon dioxide is made and used for a risk analysis of a variety of situations for which we have made concrete CO2 time monitoring. The main conclusion of these observations is that the present norms of ventilation, already insufficient, are not respected, especially in a variety of public premises, leading to high risk of contamination. Finally, we insist that public health policy in the field of airborne transmission should be based on a multi parameter analysis, considering the whole complexity of dose evaluation. | |
| medRxiv and bioRxiv | |
| 17-01-2022 | |
| Preimpreso | |
| www.medrxiv.org | |
| Inglés | |
| Epidemia COVID-19 | |
| Público en general | |
| VIRUS RESPIRATORIOS | |
| Versión publicada | |
| publishedVersion - Versión publicada | |
| Aparece en las colecciones: | Artículos científicos |
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| Increased airbone transmission of COVID 19 with new variants implications for health policies.pdf | 1.46 MB | Adobe PDF | Visualizar/Abrir |