Figure 4From: Host shifts and molecular evolution of H7 avian influenza virus hemagglutininRelative genetic diversity over time for the H7 HA of IA viruses circulating in wild (A, B) and domestic (C-G) birds. A: wild birds Eurasia-Africa-Australia; B: North and South America; C: Australia; D: Italy (1999-2001); E: Italy (2002-2007); F: Pakistan; G: USA. Dashed lines represent 95% highest posterior density.Back to article page