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• W2591254227 abstract "Memory has a great impact on the evolution of every process related to human societies. Among them, the evolution of an epidemic is directly related to the individuals' experiences. Indeed, any real epidemic process is clearly sustained by a non-Markovian dynamics: memory effects play an essential role in the spreading of diseases. Including memory effects in the susceptible-infected-recovered (SIR) epidemic model seems very appropriate for such an investigation. Thus, the memory prone SIR model dynamics is investigated using fractional derivatives. The decay of long-range memory, taken as a power-law function, is directly controlled by the order of the fractional derivatives in the corresponding nonlinear fractional differential evolution equations. Here we assume ``fully mixed'' approximation and show that the epidemic threshold is shifted to higher values than those for the memoryless system, depending on this memory ``length'' decay exponent. We also consider the SIR model on structured networks and study the effect of topology on threshold points in a non-Markovian dynamics. Furthermore, the lack of access to the precise information about the initial conditions or the past events plays a very relevant role in the correct estimation or prediction of the epidemic evolution. Such a ``constraint'' is analyzed and discussed." @default.
• W2591254227 created "2017-03-03" @default.
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• W2591254227 date "2017-02-21" @default.
• W2591254227 modified "2023-10-02" @default.
• W2591254227 title "Memory effects on epidemic evolution: The susceptible-infected-recovered epidemic model" @default.
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• W2591254227 doi "https://doi.org/10.1103/physreve.95.022409" @default.
• W2591254227 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7217510" @default.
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• W2591254227 hasPublicationYear "2017" @default.
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