Fig. 5From: Antigenic cartography of H1N1 influenza viruses using sequence-based antigenic distance calculationEpitopic Distances of H1 HA Epitopes. a-e Antigenic maps for each antigenic site (Sa, Sb, Ca1, Ca2, Cb, respectively). Strains were colored as in Fig. 2. f Average antigenic distances between all strains for each antigenic siteBack to article page