Exact Equations for SIR Epidemics on Tree Graphs

We consider Markovian susceptible-infectious-removed (SIR) dynamics on time-invariant weighted contact networks where the infection and removal processes are Poisson and where network links may be directed or undirected. We prove that a particular pair-based moment closure representation generates t...

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Published inBulletin of mathematical biology Vol. 77; no. 4; pp. 614 - 645
Main Authors Sharkey, K. J., Kiss, I. Z., Wilkinson, R. R., Simon, P. L.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.04.2015
Springer Nature B.V
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Summary:We consider Markovian susceptible-infectious-removed (SIR) dynamics on time-invariant weighted contact networks where the infection and removal processes are Poisson and where network links may be directed or undirected. We prove that a particular pair-based moment closure representation generates the expected infectious time series for networks with no cycles in the underlying graph. Moreover, this “deterministic” representation of the expected behaviour of a complex heterogeneous and finite Markovian system is straightforward to evaluate numerically.
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ISSN:0092-8240
1522-9602
DOI:10.1007/s11538-013-9923-5