It's even worse than they thought.
D000163:Acquired Immunodeficiency Syndrome; D000349:Africa; D017954:Africa South of the Sahara; D003906:Developing Countries; D004194:Disease; D004196:Disease Outbreaks; D015658:HIV Infections; D015995:Prevalence; D012106:Research; D012107:Research Design; D014777:Virus Diseases
Acquired Immunodeficiency Syndrome; Africa; Africa South Of The Sahara; Developing Countries; Diseases; Epidemics; Hiv Infections; Measurement; Prevalence; Research Methodology; Viral Diseases