Figure 7From: Comparative structural analysis of haemagglutinin proteins from type A influenza viruses: conserved and variable featuresGeographical spread of H5N1 clades. Outbreak areas for each clade are color coded as follows: 0, black; 1, yellow; 2, red; 3, violet; 4, dark green; 5, dark blue; 6, light green; 7, orange; 8, brown; 9, cyan.Back to article page