The HIV epidemic in sub-Saharan Africa.
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D017954:Africa South of the Sahara / Q000453:epidemiology; D001902:Botswana / Q000453:epidemiology; D014943:Global Health; D015658:HIV Infections / Q000453:epidemiology* / Q000209:etiology / Q000635:transmission; D006305:Health Status Indicators; D006801:Humans; D015995:Prevalence; D012959:Socioeconomic Factors