Fig. 3

Annual incidence of herd breakdowns in England and Wales during 2014. a As observed; b As the average of ten outputs from the model. In both cases incidence is calculated for herds included in the model and breakdowns at those herds
Annual incidence of herd breakdowns in England and Wales during 2014. a As observed; b As the average of ten outputs from the model. In both cases incidence is calculated for herds included in the model and breakdowns at those herds