Abstract

We study the effect of the connectivity pattern of complex networks on the propagation dynamics of epidemics. The growth time scale of outbreaks is inversely proportional to the network degree fluctuations, signaling that epidemics spread almost instantaneously in networks with scale-free degree distributions. This feature is associated with an epidemic propagation that follows a precise hierarchical dynamics. Once the highly connected hubs are reached, the infection pervades the network in a progressive cascade across smaller degree classes. The present results are relevant for the development of adaptive containment strategies.

Notes

Originally published in Physical Review Letters, v.92 no.17 (2004), 178701. DOI:10.1103/PhysRevLett.92.178701. Dr. Vespignani is affiliated with Northeastern University as of the time of deposit.

Keywords

complex networks, connectivity, containment, infectious disease, scale-free networks

Subject Categories

Epidemics, Communicable diseases

Disciplines

Physics

Publisher

American Physical Society

Publication Date

4-30-2004

Rights Information

©2004 American Physical Society

Rights Holder

American Physical Society

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