A Mathematical Model of COVID-19 Pandemic: A Case Study of Bangkok, Thailand.

In this study, we propose a new mathematical model and analyze it to understand the transmission dynamics of the COVID-19 pandemic in Bangkok, Thailand. It is divided into seven compartmental classes, namely, susceptible (), exposed (), symptomatically infected ( ), asymptomatically infected ( ), quarantined (), recovered (), and death (), respectively. The next-generation matrix approach was used to compute the basic reproduction number denoted as of the proposed model. The results show that the disease-free equilibrium is globally asymptotically stable if < 1. On the other hand, the global asymptotic stability of the endemic equilibrium occurs if > 1. The mathematical analysis of the model is supported using numerical simulations. Moreover, the model's analysis and numerical results prove that the consistent use of face masks would go on a long way in reducing the COVID-19 pandemic.