New findings indicate HIV/AIDS pandemic began around 1900, earlier than previously thought

New research indicates that the most pervasive global strain of HIV began spreading among humans between 1884 and 1924, not during the 1930s, as previously reported. The earlier period of origin coincides with the establishment of urban centers in the west-central African region where the epidemic of this particular HIV strain -- HIV-1 group M -- emerged. This suggests that urbanization and associated high-risk behaviors set the stage for the HIV/AIDS pandemic.

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