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. Author manuscript; available in PMC: 2016 Jun 10.
Published in final edited form as: J Neurovirol. 2013 Oct 16;19(6):515–522. doi: 10.1007/s13365-013-0206-6

Figure 1. Geographical distribution of HIV-1 subtypes and recombinants 2004–2007.

Figure 1

The map represents an overview of the distribution of HIV-1 subtypes based on data adapted from Hemelaar et. al. AIDS 2007 (Table 2b). Clade C continues to be the predominant clade found in HIV-infected individuals. Clade B is primarily found in North America and Europe and is the focus of the majority of research. The most diverse HIV-1 subtypes are found in Central Africa. Circulating recombinant forms (CRF) and unique recombinant forms (URF) are increasing in prevalence. The variety of colors in the map reflects the growing complexity and diversity in the HIV-1 and HAND epidemic.