The effect of stochastic variation colour.

<p>The effect of the colour of stochastic variation (spectral exponent) on epidemiology. Left panels (A)–(C): variations affect pathogen growth rate <i>r</i>_p. Right panels (D)–(F): variations affect 50% infective dose <i>ID</i>₅₀. Top panels (A) and (D): Cumulative incidences. Each dot represents a single outbreak, the number of which varies between simulations, and the lines show a marginal kernel density estimate of peak areas. Panels (B), (C), (E) and (F): number of peaks and minimum value of healthy host density. Each dot represents a single simulation run. The lines show smoothing spline fits to the points. In the left panels variance <i>A</i> = 0.0625. In the right panels variance <i>A</i> = 0.01. Colours red, black, and blue show results on rapid, intermediate, and slow immunity loss rates, respectively. See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0145511#pone.0145511.t001" target="_blank">Table 1</a> for model parameters.