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 NCSI Talks: SIR With Scrolling Bars

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SIR With Scrolling Bars
Shodor > NCSI Talks > Excel > SIR With Scrolling Bars

SIR with scroll bars Model

What is this model?

This is a system model of the spread of disease in a population, which classifies people into three categories: susceptible (S), infected (I), and resistant (R). It tracks the proportion of the population that is infected by the disease on any given day. The infection rate, recovery rate, and time step are user-controlled parameters. By the end of the model, the disease has stopped spreading because there are no longer any infected people. A graph depicts the change in the number of people who are healthy (S), sick (I) and recovered (R) over the progression of the epidemic.

What can this Model be used to teach?

  • Understand the relationship between the proportion of the population that is healthy and the spread of disease
  • Understand the effect of each parameter on the populations over time

    • Related Models

    Disease Epidemic Model (AgentSheets)

    Spread of Disease Model (Interactivate)

    Diffusion in a Box Model (AgentSheets)