Reconstruction of the Evolutionary Dynamics of the A(H1N1)pdm09 Influenza Virus in Italy during the Pandemic and Post-Pandemic Phases
Figure 4
Map representing the localities of origin of the pandemic (red) and post-pandemic (blu) clades.
The circle diameter is proportional to the number of isolates sampled in the locality. The low panel histogram represents the population density (number of inhabitants/km2).