摘要：A delay SEIRS model with pulse vaccination incorporating a
general media coverage function and saturation recovery is investigated. Using
the discrete dynamical system determined by the stroboscopic map, we obtain the
existence of the disease-free periodic solution and its exact expression. Further,
using the comparison theorem, we establish the sufficient conditions of global
attractivity of the disease-free periodic solution. Moreover, we show that the
disease is uniformly persistent if vaccination rate is less than . Finally, we
discuss the effect of media coverage on controlling disease.
