Inhomogeneous epidemics on weighted networks

Details Inhomogeneous epidemics on weighted networks Inhomogeneous epidemics on weighted networks

2011-12-20

arxiv.org/abs/1112.4718v1

Mathematics

Probability

Scientific paper

A social (sexual) network is modeled by an extension of the configuration model to the situation where edges have weights, e.g. reflecting the number of sex-contacts between the individuals. An epidemic model is defined on the network such that individuals are heterogeneous in terms of how susceptible and infectious they are. The basic reproduction number R_0 is derived and studied for various examples, but also the size and probability of a major outbreak. The qualitative conclusion is that R_0 gets larger as the community becomes more heterogeneous but that different heterogeneities (degree distribution, weight, susceptibility and infectivity) can sometimes have the cumulative effect of homogenizing the community, thus making $R_0$ smaller. The effect on the probability and final size of an outbreak is more complicated.

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