The spread of epidemic disease on networks

Details The spread of epidemic disease on networks The spread of epidemic disease on networks

2002-04-30

arxiv.org/abs/cond-mat/0205009v1

Phys. Rev. E 66, 016128 (2002)

Physics

Condensed Matter

Statistical Mechanics

12 pages, 3 figures

Scientific paper

10.1103/PhysRevE.66.016128

The study of social networks, and in particular the spread of disease on networks, has attracted considerable recent attention in the physics community. In this paper, we show that a large class of standard epidemiological models, the so-called susceptible/infective/removed (SIR) models can be solved exactly on a wide variety of networks. In addition to the standard but unrealistic case of fixed infectiveness time and fixed and uncorrelated probability of transmission between all pairs of individuals, we solve cases in which times and probabilities are non-uniform and correlated. We also consider one simple case of an epidemic in a structured population, that of a sexually transmitted disease in a population divided into men and women. We confirm the correctness of our exact solutions with numerical simulations of SIR epidemics on networks.

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