Fig. 2.
Probability of an outbreak of MDV within a cohort of birds with varying initial dust, and different strains (blue, red, and green dots). Farms are small (500 birds at 5 kg/m2), medium (5000 birds at 20 kg/m2) or large (30,000 birds at 35 kg/m2). Birds are either all unvaccinated or vaccinated. The probability that there is any virus left (colored dots) is equivalent to the probability that at least one bird is infected (analytic results given by black dashed lines). Note the different x-axis domains on the plots d, e, and f. (a) Unvacc. small farm, (b) unvacc. medium farm, (c) unvacc. large fram, (d) vacc. small farm, (e) vacc. medium farm and (f) vacc. large farm. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of the article.)