Fig. 5. Comparison of simulated weekly dengue incidence for two distinct models of life-long immunity.

A. Life-long immunity once individuals are boosted to the high immune group, assuming zero waning rate in the $R_H$ compartment. B. Same as A, but with constant influx of infections incorporated in the force of infection as $\lambda \left(t\right)=(\iota +\beta I\left(t\right))/N\left(t\right)$; where $\iota =10$. Simulation results of the mean of 10 realizations. C. Wavelet power spectrum (Morlet) of the time-series of the log-transformed weekly dengue incidence in B, and D. averaged over the time course. The black contours in C (outline) indicate the regions of greater than 95% confidence for the power values. See Table S1 for other parameters used.