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. 2012 Apr 18;7(4):e35649. doi: 10.1371/journal.pone.0035649

Figure 4. HIV-1 subtype C migration rates and routine traffic of people amongst the three states of the South Brazilian region.

Figure 4

Capitals are represented by blue circles proportional to the incidence of AIDS cases per 100,000 inhabitants in each city in 2009 [1]. The arrows are colored according to the routine traffic between states [41], from green (less) to red (more) passing through yellow, and their thickness is proportional to HIV-1 subtype C migration rate between state capitals as measured by BayesTraits. HIV-1 subtype C migration rate from Porto Alegre to Curitiba was more than 100 fold smaller than any of the others and is not represented in this picture.