Martcheva, Maia; Thieme, Horst R. Progression age enhanced backward bifurcation in an epidemic model with super-infection. (English) Zbl 1097.92046 J. Math. Biol. 46, No. 5, 385-424 (2003). Summary: We consider a model for a disease with a progressing and a quiescent exposed class and variable susceptibility to super-infection. The model exhibits backward bifurcations under certain conditions, which allow for both stable and unstable endemic states when the basic reproduction number is smaller than one. Cited in 83 Documents MSC: 92D30 Epidemiology 34G20 Nonlinear differential equations in abstract spaces 34K18 Bifurcation theory of functional-differential equations 37N25 Dynamical systems in biology PDF BibTeX XML Cite \textit{M. Martcheva} and \textit{H. R. Thieme}, J. Math. Biol. 46, No. 5, 385--424 (2003; Zbl 1097.92046) Full Text: DOI