The Dynamics of the Pulse Birth in an SIR Epidemic Model with Standard Incidence

Figure 2

The time series and the orbits of the system (2.4) with 𝑅^∗>1. (a) and (b) show the time series for susceptible and infective, respectively. (c) shows the orbits 𝑠−𝑖 plane.

(a)

(b)

(c)