Establishment and Analysis of COVID-19 Models with Isolation Measures

Abstract:
Considering the transmission mechanism of COVID-19 and the isolation measures adopted, a SIR model with isolation measures and nonlinear infection rate was established, and the transmission trend of COVID-19 was obtained by simulation. The comparison of simulation results with COVID-19 data suggests that isolation measures have played a key role in controlling the outbreak. Different execution times of isolation measures were set in the model and multiple sets of simulation experiments were performed. The results showed that isolation measures should be implemented as soon as possible in order to control the epidemic as soon as possible. At the same time, in order to better control the development of the epidemic, the control in the later stages of the epidemic should not be reduced in strength. The research results can provide theoretical basis and guidance for the scientific prevention and control of COVID-19 and other large-scale infectious diseases in the future.