Fig. 5: Map summarizing the viral flow into Portuguese Health Administration regions.

A The plot shows the relative number of transitions between the four countries of origin linked with most introductions to different regions in Portugal. For summaries that show all transitions to and from all connected locations, we refer to the Supplementary Data 4. B The plot shows the relative number of infections generated by introductions from the four countries of origin linked with most relative number of infections generated in different regions in Portugal. For summaries that show the size of all introductions to and from all connected locations, we refer to the Supplementary Data 5. For a broader overview of the 11 countries linked with most introductions and relative number of infections generated, we also refer to Fig. 4. For both panels, introductions (left) and relative number of infections generated (right) were estimated across phylogenies inferred for the whole dataset, i.e., including both Pango lineages A and B (thin – low proportion of number/size of viral introductions attributed to this source; thick – high proportion of number/size of viral introductions attributed to this source). We note that there is no temporal order for the transitions involved.