Département de physique, de génie physique et d'optique, Université Laval, Québec (Québec), Canada G1V 0A6.
Centre interdisciplinaire en modélisation mathématique, Université Laval, Québec (Québec), Canada G1V 0A6.
Phys Rev Lett. 2021 Mar 5;126(9):098301. doi: 10.1103/PhysRevLett.126.098301.
Recommendations around epidemics tend to focus on individual behaviors, with much less efforts attempting to guide event cancellations and other collective behaviors since most models lack the higher-order structure necessary to describe large gatherings. Through a higher-order description of contagions on networks, we model the impact of a blanket cancellation of events larger than a critical size and find that epidemics can suddenly collapse when interventions operate over groups of individuals rather than at the level of individuals. We relate this phenomenon to the onset of mesoscopic localization, where contagions concentrate around dominant groups.
有关传染病的建议往往侧重于个人行为，而试图指导取消活动和其他集体行为的努力则要少得多，因为大多数模型缺乏描述大型聚会所需的高阶结构。通过对网络上传染病的高阶描述，我们对超过临界大小的事件进行全面取消的影响进行建模，并发现当干预措施在个体群体上而不是在个体层面上运作时，传染病可能会突然崩溃。我们将这种现象与介观定位的出现联系起来，即传染病集中在主导群体周围。
