Source avec lien : Environmental Science and Pollution Research, (En ligne). 10.1007/s11356-022-21766-x
Cette étude introduit un nouveau concept, le rapport dynamique de dépôt de virus (α), qui reflète les changements dynamiques de l’inactivation virale et du dépôt de gouttelettes dans des environnements ambiants variables. Un modèle de Wells-Riley modifié par un état non stable est établi pour prédire le risque d’infection dans un espace aérien partagé et mettre en évidence les conditions environnementales à haut risque.
Environmental parameters have a significant impact on the spread of respiratory viral diseases (temperature (T), relative humidity (RH), and air saturation state). T and RH are strongly correlated with viral inactivation in the air, whereas supersaturated air can promote droplet deposition in the respiratory tract. This study introduces a new concept, the dynamic virus deposition ratio (α), that reflects the dynamic changes in viral inactivation and droplet deposition under varying ambient environments. A non-steady-state-modified Wells-Riley model is established to predict the infection risk of shared air space and highlight the high-risk environmental conditions. Findings reveal that a rise in T would significantly reduce the transmission of COVID-19 in the cold season, while the effect is not significant in the hot season. The infection risk under low-T and high-RH conditions, such as the frozen seafood market, is substantially underestimated, which should be taken seriously. The study encourages selected containment measures against high-risk environmental conditions and cross-discipline management in the public health crisis based on meteorology, government, and medical research.