Solver for the SIR Model of the Spread of Disease

Warren Weckesser

This form allows you to solve the differential equations of the SIR model of the spread of disease.

S'(t) = -rSI
I'(t) = rSI - γI
R'(t) = γI

Enter the following data, then click on Show Solution below.

r =
γ =

Initial conditions:
S(0) =
I(0) =
R(0) =

Duration of solution: (Maximum duration is 1000.)

Copyright (c) 2005 Warren Weckesser