Research Article

Positive Periodic Solutions of an Epidemic Model with Seasonality

Figure 2

The phase curves of the system under different initial conditions. (a) In the region with and ; (b) in the region with and ; (c) in the region with and ; (d) in the region with and ; (e) in the region with and . The value of other parameters can be seen in Table 1.
470646.fig.002a
(a)
470646.fig.002b
(b)
470646.fig.002c
(c)
470646.fig.002d
(d)
470646.fig.002e
(e)