Click here to download the equations as text
The SIR model demonstrates the spread of an infectious disease over time. The display options (located in the bottom left corner of the applet) are set to show the number of Susceptible People as well as the number of Infected People.
This example applet shows the results of the SIR model that is described in Shodor's
Vensim PLE online tutorial.
The tutorial includes step-by-step creation of the model along with other
useful information about model building in Vensim.