COVID-19 that has emerged in the end of 2019 has changed the life of mankind across countries in the world. Since the cause of COVID-19 is categorized as novel virus, its characteristics and actions have not yet been completely understood. Various studies are currently underway to unravel its mystery. In perspective of epidemiology, we want to understand COVID-19 through SEIR compartment model.

The study used secondary data were obtained from Corona Virus Disease Response Acceleration Task Force of Indonesia (https://covid19.go.id/). These data included COVID-19 cases reported from the beginning in 2 March 2020 until the 86th day cases were reported. The basic reproduction index (R₀) was computed. A polynomial regression was applied to obtained coefficients to be included in the available equation. Sample of size 30 gave  and  that were significant with  and its polynomial regression model showed  and This sample of size gave the better estimate of R₀, it is equal to 3.63.

COVID-19, SEIR, R_0^.