Fig. 5From: Spatial analysis and temporal trends of porcine reproductive and respiratory syndrome in Denmark from 2007 to 2010 based on laboratory submission dataBiannually smoothed relative risk surfaces in Denmark from 2007 to 2010. Smoothed surfaces of the probability of swine herds being PRRSV type 1 (a) and type 2 (b) seropositive (relative risk) at a given location biannually during the period 2007 to 2010. Legend was defined based on 20 % quantilesBack to article page