Velocity and hierarchical spread of epidemic outbreaks in scale-free networks

Title:
Velocity and hierarchical spread of epidemic outbreaks in scale-free networks
Creator:
Barthelemy, M (Author)
Barrat, A (Author)
Pastor-Satorras, R (Author)
Vespignani, A (Author)
Language:
English
Publisher:
American Physical Society
Copyright date:
2004
Type of resource:
Text
Genre:
Articles
Format:
electronic
Digital origin:
born digital
Abstract/Description:
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.
Comments:
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.
Subjects and keywords:
Epidemics
Communicable diseases
complex networks
connectivity
containment
infectious disease
scale-free networks
Physics

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