Epidemiological validation of the IBM with two strains and environmental transmission. The blue and red boxplots show the distributions of epidemiological signatures of IBM and SIR respectively. For the sake of clarity, these distributions have been computed only where at least one strain displays an epidemics (defined as an epidemic peak greater than 50 individuals). 500 replications have been used. The epidemiological signatures are described in the main text and the parameters used are detailed in table 1.