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Epidemics on Random Graphs with Tunable Clustering

Part of: Graph theory

Published online by Cambridge University Press:  14 July 2016

Tom Britton ,
Maria Deijfen ,
Andreas N. Lagerås  and
Mathias Lindholm
Tom Britton*
Affiliation:
Stockholm University
Maria Deijfen*
Affiliation:
Stockholm University
Andreas N. Lagerås*
Affiliation:
Stockholm University
Mathias Lindholm*
Affiliation:
Stockholm University
*
∗Postal address: Department of Mathematics, Stockholm University, 106 91 Stockholm, Sweden.
∗Postal address: Department of Mathematics, Stockholm University, 106 91 Stockholm, Sweden.
∗Postal address: Department of Mathematics, Stockholm University, 106 91 Stockholm, Sweden.
∗Postal address: Department of Mathematics, Stockholm University, 106 91 Stockholm, Sweden.
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Abstract

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In this paper a branching process approximation for the spread of a Reed-Frost epidemic on a network with tunable clustering is derived. The approximation gives rise to expressions for the epidemic threshold and the probability of a large outbreak in the epidemic. We investigate how these quantities vary with the clustering in the graph and find that, as the clustering increases, the epidemic threshold decreases. The network is modeled by a random intersection graph, in which individuals are independently members of a number of groups and two individuals are linked to each other if and only if there is at least one group that they are both members of.

Keywords

Epidemicsrandom graphclusteringbranching processepidemic threshold

MSC classification

Secondary: 92D30: Epidemiology 05C80: Random graphs
Type
Research Article
Information
Journal of Applied Probability , Volume 45 , Issue 3 , September 2008 , pp. 743 - 756
Copyright
Copyright © Applied Probability Trust 2008 

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