Epidemic spreading with nonlinear infectivity in weighted scale-free networks

X Chu, Z Zhang, J Guan, S Zhou - Physica A: Statistical Mechanics and its …, 2011 - Elsevier
Physica A: Statistical Mechanics and its Applications, 2011Elsevier
In this paper, we investigate the epidemic spreading for the SIR model in weighted scale-
free networks with the nonlinear infectivity and weighted transmission rate. Concretely, we
introduce the infectivity exponent α and the weight exponent β into the epidemic system,
then examine the impact of α and β on the epidemic spreading. We show that one can adjust
the values of α and β to rebuild a nonzero finite epidemic threshold. Furthermore, we also
find the infectivity exponent α has a stronger effect not only on the epidemic threshold, but …
In this paper, we investigate the epidemic spreading for the SIR model in weighted scale-free networks with the nonlinear infectivity and weighted transmission rate. Concretely, we introduce the infectivity exponent α and the weight exponent β into the epidemic system, then examine the impact of α and β on the epidemic spreading. We show that one can adjust the values of α and β to rebuild a nonzero finite epidemic threshold. Furthermore, we also find the infectivity exponent α has a stronger effect not only on the epidemic threshold, but also on the epidemic prevalence. In addition, it is also interesting to see that the absence of the epidemic threshold appears not very dejected, since the prevalence grows much more slowly as the transmission rate λ increases.
Elsevier
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