Duration of the year for which the TER exceeds <i>z</i> in the stochastic SIR model with seasonal transmission, for a range of values of <i>M</i> and <i>z.</i>

A. The TER (obtained by solving system of equations <a href="http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.1012364#pcbi.1012364.e132" target="_blank">(11)</a> in the main text numerically) for a range of different values of the threshold number of infections, <i>M</i>. The blue shaded region shows the period of the year for which the TER exceeds when ,. B. The duration of the year for which the TER exceeds , shown as a function of <i>M</i>. C. Heatmap indicating the duration of the year for which the TER exceeds , shown for a range of values of <i>M</i> and <i>z</i>. In all panels, values of <i>β</i>₀ = 4, <i>β</i>₁ = 5 and <i>γ</i> = 4 . 9 month^-1 are used. A time step of months was used when computing the TER. The overall population size was assumed to be <i>N</i> = 1 , 000 individuals. (PDF)