Fig. 2From: Surveillance of avian influenza viruses in South Korea between 2012 and 2014Monthly prevalence of AIV compared with sampling size between 2012 and 2014. The bars represent the number of AIV isolates during 2012–2014: a wild birds; b domestic poultry; and c live bird market. The lines represent the scaled number of samples. The left and right Y axes indicate the number of AIV isolates and samples, respectively. The X axis indicates monthsBack to article page