Figure 7.

City G with a complex immune response. In the right third of the plot, the cyan bars obscure the smaller grey bars; the latter are enveloped by the green curve which is still visible. ‘k’ Denotes thousand and ‘L’ denotes hundred thousand. W/7 denotes the weekly increments in cases scaled down by 7 as described previously, while HVF and LVF refer to the higher and lower virulence forms of the disease, respectively.