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Epidemic Spreading In Scale-Free Networks, R Pastor-Satorras, A Vespignani
Epidemic Spreading In Scale-Free Networks, R Pastor-Satorras, A Vespignani
Alessandro Vespignani
The Internet has a very complex connectivity recently modeled by the class of scale-free networks. This feature, which appears to be very efficient for a communications network, favors at the same time the spreading of computer viruses. We analyze real data from computer virus infections and find the average lifetime and persistence of viral strains on the Internet. We define a dynamical model for the spreading of infections on scale-free networks. finding the absence of an epidemic threshold and its associated critical behavior. This new epidemiological framework rationalizes data of computer viruses and could help in the understanding of other …
Epidemic Dynamics And Endemic States In Complex Networks, R Pastor-Satorras, A Vespignani
Epidemic Dynamics And Endemic States In Complex Networks, R Pastor-Satorras, A Vespignani
Alessandro Vespignani
We study by analytical methods and large scale simulations a dynamical model for the spreading of epidemics in complex networks. in networks with exponentially bounded connectivity we recover the usual epidemic behavior with a threshold defining a critical point below that the infection prevalence is null. On the contrary, on a wide range of scale-free networks we observe the absence of an epidemic threshold and its associated critical behavior. This implies that scale-free networks are prone to the spreading and the persistence of infections whatever spreading rate the epidemic agents might possess. These results can help understanding. computer virus epidemics …