Cumulative infections approach 20 million.
D000163:Acquired Immunodeficiency Syndrome; D004194:Disease; D015658:HIV Infections; D015994:Incidence; D007390:International Agencies; D009938:Organizations; D012106:Research; D012107:Research Design; D014480:United Nations; D014777:Virus Diseases; D014944:World Health Organization
Acquired Immunodeficiency Syndrome; Diseases; Error Sources; Hiv Infections; Incidence; International Agencies; Measurement; Organizations; Research Methodology; Un; Undercount; Viral Diseases; Who; World