The basic reproduction number can be accurately estimated within 14 days after societal lockdown: The early stage of the COVID-19 epidemic in Denmark.
ObjectiveEarly identification of the basic reproduction number (BRN) is imperative to political decision making during an epidemic.In this study, we estimated the BRN 7, 14, 21 and 28 days after societal lockdown of Denmark during the early stage of the COVID-19 epidemic.MethodWe implemented the SEIR dynamical system for disease spread without vita