Vaccination’s Role in Combating the Omicron Variant Outbreak in Thailand: An Optimal Control Approach
Issued Date
2022-10-01
Resource Type
eISSN
22277390
Scopus ID
2-s2.0-85140783566
Journal Title
Mathematics
Volume
10
Issue
20
Rights Holder(s)
SCOPUS
Bibliographic Citation
Mathematics Vol.10 No.20 (2022)
Suggested Citation
Lamwong J., Pongsumpun P., Tang I.M., Wongvanich N. Vaccination’s Role in Combating the Omicron Variant Outbreak in Thailand: An Optimal Control Approach. Mathematics Vol.10 No.20 (2022). doi:10.3390/math10203899 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/84251
Title
Vaccination’s Role in Combating the Omicron Variant Outbreak in Thailand: An Optimal Control Approach
Author(s)
Author's Affiliation
Other Contributor(s)
Abstract
COVID-19 is the name of the new infectious disease which has reached the pandemic stage and is named after the coronavirus (COVs) which causes it. COV is a single-stranded RNA virus which in humans leads to respiratory tract symptoms which can lead to death in those with low immunities, particularly older people. In this study, a standard dynamic model for COVID-19 was proposed by comparing a simple model and the optimal control model to reduce the number of infected people and become a guideline to control the outbreak. Control strategies are the vaccination rate and vaccine-induced immunity. An analysis was performed to find an equilibrium point, the basic reproduction number (Formula presented.), and conditions that generate stability by using Lyapunov functions to prove the stability of the solution at the equilibrium point. Pontryagin’s maximum principle was used to find the optimal control condition. Moreover, sensitivity analysis of the parameters was performed to learn about the parameters that might affect the outbreak in order to be able to control the outbreak. According to the analysis, it is seen that the efficacy of vaccines (Formula presented.) and the infection rate (Formula presented.) will affect the increased (decreased) incidence of the outbreak. Numerical analyses were performed on the Omicron variant outbreak data collected from the Thailand Ministry of Health, whose analyses then indicated that the optimal control strategy could lead to planning management and policy setting to control the COVID-19 outbreak.
