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Basic reinfection number and backward bifurcation

1 Jan 2021

Abstract excerpt

Some epidemiological models exhibit bi-stable dynamics even when the basic reproduction number $ {{{\cal R}_{0}}} $ is below $ 1 $, through a phenomenon known as a backward bifurcation. Causes for this phenomenon include exogenous reinfection, super-infection, relapse, vaccination exercises, heterogeneity among subpopulations, etc. To measure the reinfection forces, this paper defines a second threshold: the...

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PMID: 34814289
DOI: 10.3934/mbe.2021400

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