Abstract
A cholera model with continuous age structure is given as a system of hyperbolic (first-order) partial differential equations (PDEs) in combination with ordinary differential equations. Asymptomatic infected and susceptibles with partial immunity are included in this epidemiology model with vaccination rate as a control; minimizing the symptomatic infecteds while minimizing the cost of the vaccinations represents the goal. With the method of characteristics and a fixed point argument, the existence of a solution to our nonlinear state system is achieved. The representation and existence of a unique optimal control are derived. The steps to justify the optimal control results for such a system with first order PDEs are given. Numerical results illustrate the effect of age structure on optimal vaccination rates.
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Acknowledgments
This work was funded by the National Science Foundation DMS-0813563. Lenhart’s support also included funding from the National Institute for Mathematical and Biological Synthesis NSF EF-0832858. Wang’s work was partially supported by National Science Foundation DMS-1412826. We thanks Boloye Gomero for her initial work with the graphic for the description of the model.
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Fister, K.R., Gaff, H., Lenhart, S., Numfor, E., Schaefer, E., Wang, J. (2016). Optimal Control of Vaccination in an Age-Structured Cholera Model. In: Chowell, G., Hyman, J. (eds) Mathematical and Statistical Modeling for Emerging and Re-emerging Infectious Diseases. Springer, Cham. https://doi.org/10.1007/978-3-319-40413-4_14
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