Introduction - If you have any usage issues, please Google them yourself
The SIR model is the most classical model in the epidemic model, where S represents the susceptible person, I means the infected person, and R represents the restorer. In the SIR model, the infected population is the source of infection, and he passes the infectious disease to the susceptible people through a certain chance. He has a certain chance of being cured, immune, or dead. Once the susceptible population is infected, it becomes a new source of infection. The population was divided into three groups, susceptible persons, infected persons and recovered persons (recovered).