Rowe Consulting, 22 Chemin des Moines, 22750, Saint Jacut de La Mer, France.
CNRS, IPR (Institut de Physique de Rennes)-UMR 6251, Université de Rennes, 35000, Rennes, France.
Environ Res. 2021 Jul;198:111189. doi: 10.1016/j.envres.2021.111189. Epub 2021 Apr 16.
In this paper we develop a simple model of the inhaled flow rate of aerosol particles of respiratory origin i.e. that have been exhaled by other people. A connection is made between the exposure dose and the probability of developing an airborne disease. This allows a simple assessment of the outdoor versus indoor risk of contamination to be made in a variety of meteorological situations. It is shown quantitatively that for most cases, the outdoor risk is orders of magnitude less than the indoor risk and that it can become comparable only for extremely specific meteorological and topographical situations. It sheds light on various observations of COVID-19 spreading in mountain valleys with temperature inversions while at the same time other areas are much less impacted.
在本文中，我们开发了一个简单的模型，用于描述源自呼吸道的气溶胶颗粒（即已被他人呼出的气溶胶颗粒）的吸入流速。我们将暴露剂量与发生空气传播疾病的概率联系起来。这使得我们可以在各种气象条件下，对户外和室内污染风险进行简单的评估。定量结果表明，对于大多数情况，户外风险要小几个数量级，只有在极其特定的气象和地形条件下，户外风险才会与室内风险相当。该模型解释了为什么在山谷中出现逆温时，新冠病毒传播情况更严重，而同时其他地区的影响则小得多。
