Persistence as function of activation.

<p>A) Persistence, <i>P</i>, as a function of activation rate. B) Latent and infectious hosts, and , and the fraction of activation, , as a function of activation rate. The left axis applies to <i>L</i> and <i>I</i>, the right axis to . C) Persistence as function of fraction of hosts that activate. Also indicated in the figures is the optimal level of persistence, <i>P</i>₀, and the values for activation rate and fraction of activators at which this optimum occurs, and . All parameters are as given in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0105721#pone-0105721-t001" target="_blank">table 1</a>.