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On the Stability and Equilibrium Points of Multistaged SI (n) R Epidemic Models

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Date
2015
Author
Nistal Riobello, Raúl ORCID
De la Sen Parte, Manuel ORCID
Alonso Quesada, Santiago
Ibeas Hernández, Asier ORCID
Garrido Hernández, Aitor Josu ORCID
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Discrete Dynamics in Nature and Society 2015 : (2015) // Article ID 379576
URI
http://hdl.handle.net/10810/18200
Abstract
This paper relies on the concept of next generation matrix defined ad hoc for a new proposed extended SEIR model referred to as SI(n)R-model to study its stability. The model includes n successive stages of infectious subpopulations, each one acting at the exposed subpopulation of the next infectious stage in a cascade global disposal where each infectious population acts as the exposed subpopulation of the next infectious stage. The model also has internal delays which characterize the time intervals of the coupling of the susceptible dynamics with the infectious populations of the various cascade infectious stages. Since the susceptible subpopulation is common, and then unique, to all the infectious stages, its coupled dynamic action on each of those stages is modeled with an increasing delay as the infectious stage index increases from 1 to n. The physical interpretation of the model is that the dynamics of the disease exhibits different stages in which the infectivity and the mortality rates vary as the individual numbers go through the process of recovery, each stage with a characteristic average time.
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