Before revision:  In this article, we consider a dynamical model and analyze the impact of some control measures that can lead to the reduction of exposed and infectious individuals of the transmission of COVID-19 . We investigate four control strategies diagnosis and spraying the environment to curb the transmission dynamics of the novel virus .
After revision:  In this article, we consider an optimal control COVID-19 transmission model and assess the impact of some control measures that can lead to the reduction of exposed and infectious individuals of the transmission of COVID-19 . We investigate four control strategies diagnosis and spraying the environment to curb the transmission dynamics of the novel virus .