Abstract
The COVID-19 pandemic has caused severe global disasters,highlighting the importance of understanding the details and trends of epidemic transmission in order to introduce efficient intervention measures.While the widely used determin-istic compartmental models have qualitatively presented continuous"analytical"insight and captured some transmission features,their treatment usually lacks spatiotemporal variation.Here,we propose a stochastic individual dynamical(SID)model to mimic the random and heterogeneous nature of epidemic propagation.The SID model provides a unifying frame-work for representing the spatiotemporal variations of epidemic development by tracking the movements of each individual.Using this model,we reproduce the infection curves for COVID-19 cases in different areas globally and find the local dy-namics and heterogeneity at the individual level that affect the disease outbreak.The macroscopic trend of virus spreading is clearly illustrated from the microscopic perspective,enabling a quantitative assessment of different interventions.Seem-ingly,this model is also applicable to studying stochastic processes at the"meter scale",e.g.,human society's collective dynamics.
基金项目
国家自然科学基金(22273034)
Frontiers Science Center for Critical Earth Material Cycling of Nanjing University()
NETL
NSTL
万方数据