Department of Chemistry, University of Cambridge, Cambridge, United Kingdom.
Phys Rev Lett. 2011 May 27;106(21):218701. doi: 10.1103/PhysRevLett.106.218701. Epub 2011 May 24.
An epidemiological model which incorporates synergistic effects that allow the infectivity and/or susceptibility of hosts to be dependent on the number of infected neighbors is proposed. Constructive synergy induces an exploitative behavior which results in a rapid invasion that infects a large number of hosts. Interfering synergy leads to a slower and sparser explorative foraging strategy that traverses larger distances by infecting fewer hosts. The model can be mapped to a dynamical bond percolation with spatial correlations that affect the mechanism of spread but do not influence the critical behavior of epidemics.
本文提出了一种流行病学模型，该模型包含协同效应，使宿主的传染性和/或易感性依赖于感染邻居的数量。建设性协同作用会导致掠夺性行为，从而导致快速入侵，感染大量宿主。干扰性协同作用会导致较慢且较稀疏的探索性觅食策略，通过感染较少的宿主来传播更大的距离。该模型可以映射到具有空间相关性的动态键渗流，这些相关性会影响传播机制，但不会影响流行病的临界行为。
