Fig. 32From: Diversity and distribution of type A influenza viruses: an updated panorama analysis based on protein sequencesPhylogenetic diversity and distribution of IAVs based on NS gene sequences. Based on the viral NS gene sequences, IAVs were classified into three primary lineages, NS.1, NS.2 and NS.3 which mainly corresponded to AIVs, AIVs and EIVsBack to article page