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The effects of public health measures on severe dengue cases: An optimal control approach

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  • Srivastav, Akhil Kumar
  • Steindorf, Vanessa
  • Stollenwerk, Nico
  • Aguiar, Maíra

Abstract

Dengue fever is the most important viral mosquito-borne disease worldwide, with approximately 3.9 billion people at risk of acquiring dengue infection. Measures against mosquito bite combined with vector control programs to reduce mosquito population have been used in endemic countries for several years. Most recently, vaccines have become an important ally to prevent and control disease transmission. Economic costs of dengue control programs vary from region to region and therefore designing an optimal control strategy must be evaluated at different epidemiological contexts. Using a multi-strain vector-host mathematical model, we investigate the impact of different control measures to reduce dengue prevalence. A detailed sensitivity analysis to identify the key parameters influencing disease transmission is followed by an exploratory analysis of the possible solutions for the optimal control problem considering preventive measures to avoid mosquito bites, reduce mosquito population and vaccinate human hosts. The proposed cost functional includes a weighted sum of several efforts (not necessarily quantified as economic costs) for the controls which are evaluated alone and combined. The control system is analyzed using the Pontryagin‘s Principle for optimal control where different strategies are compared. Our results have shown that the simultaneous use of intervention measures are highly effective to reduce disease cases, however, the use of a single control measure can be as effective as the use of two or more controls combined. A careful evaluation of the epidemiological scenario is advised before designing strategies for disease prevention and control, allowing an optimal allocation of the public health resources.

Suggested Citation

  • Srivastav, Akhil Kumar & Steindorf, Vanessa & Stollenwerk, Nico & Aguiar, Maíra, 2023. "The effects of public health measures on severe dengue cases: An optimal control approach," Chaos, Solitons & Fractals, Elsevier, vol. 172(C).
    • Handle: RePEc:eee:chsofr:v:172:y:2023:i:c:s0960077923004782
    DOI: 10.1016/j.chaos.2023.113577
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    References listed on IDEAS

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    1. Steindorf, Vanessa & Srivastav, Akhil Kumar & Stollenwerk, Nico & Kooi, Bob W. & Aguiar, Maíra, 2022. "Modeling secondary infections with temporary immunity and disease enhancement factor: Mechanisms for complex dynamics in simple epidemiological models," Chaos, Solitons & Fractals, Elsevier, vol. 164(C).
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