Introduction - If you have any usage issues, please Google them yourself
For a long time, the establishment of an infectious disease model to describe the infectious disease process, the analysis of the change of the number of infected people, the forecast of the arrival of the climax of infectious diseases, and so on, has always been a subject of attention of experts and officials of various countries. Here we introduce several infectious diseases model and analysis. Here we introduce three models, namely SI model, SIS model and SIR model.