SimInf (version 9.8.1)

SIS-class: Definition of the SIS model

Description

Class to handle the SIS SimInf_model.

Details

The SIS model contains two compartments; number of susceptible (S), and number of infectious (I). Moreover, it has two state transitions, $$S \stackrel{\beta S I / N}{\longrightarrow} I$$ $$I \stackrel{\gamma I}{\longrightarrow} S$$ where \(\beta\) is the transmission rate, \(\gamma\) is the recovery rate, and \(N=S+I\).

Examples

## Create an SIS model object.
model <- SIS(u0 = data.frame(S = 99, I = 1),
             tspan = 1:100,
             beta = 0.16,
             gamma = 0.077)

## Run the SIS model and plot the result.
set.seed(22)
result <- run(model)
plot(result)