Britannica Sources used in this answer

Why has sub-Saharan Africa been especially affected by HIV/AIDS?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

AIDS Scanning electron micrograph of HIV-1 virions (green) budding from a cultured lymphocyte. Multiple round bumps on the cell surface represent sites of virion assembly and budding.

Sub-Saharan Africa has been disproportionately affected by the HIV/AIDS pandemic due to a combination of historical, social, and economic factors.

The virus is believed to have emerged in central and western Africa between 1884 and 1924, likely originating as a zoonosis transmitted from primates to humans through the hunting and consumption of bushmeat. Once the virus entered the human population, its spread was significantly accelerated by factors such as increasing urbanization and long-distance travel within the region.12

In the modern era, the high prevalence of HIV in sub-Saharan Africa—where roughly two-thirds of all global infections occur—is compounded by significant barriers to healthcare. Access to life-saving antiretroviral therapy remains limited in many areas due to:32

Economic constraints: Funding shortages and poverty limit the availability of medical supplies.32
Infrastructure challenges: A lack of trained medical personnel and facilities, often exacerbated by difficult geographic terrain, hinders effective healthcare delivery.34
Social factors: Stigma and political opposition have historically impeded prevention and treatment efforts.34

Addressing these disparities is a moral imperative, as ensuring equitable access to treatment and prevention is essential to protecting human life and dignity.32