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Li, M.Y., Graef, J.R., Wang, L. and Karsai, J. (1999) Global dynamics of a SEIR model with varying total population size. Mathematical Bioscience, 160, 191-213. doi:10.1016/S0025-5564(99)00030-9

has been cited by the following article:

• TITLE: Time delay in non-lethal infectious diseases

  AUTHORS: R. De Luca

  KEYWORDS: Delay Differential Equations; Infectious Diseases

  JOURNAL NAME: Natural Science, Vol.4 No.8, August 29, 2012

  ABSTRACT: The effects of the incubation period q on the dynamics of non-lethal infectious diseases in a fixed-size population are studied by means of a delay differential equation model. It is noted that the ratio between the quantity q and the time τ for recovering from the illness plays an important role in the onset of the epidemic breakthrough. An approximate analytic expression for the solution of the delay differential equation governing the dynamics of the system is proposed and a comparison is made with the classical SEIR model.