Prevention of disease the answer.
D000163:Acquired Immunodeficiency Syndrome; D000349:Africa; D017954:Africa South of the Sahara; D000351:Africa, Eastern; D000352:Africa, Northern; D003140:Communicable Disease Control; D003469:Culture; D003695:Delivery of Health Care; D003710:Demography; D003906:Developing Countries; D004194:Disease; D004467:Economics; D004864:Equipment and Supplies; D005006:Ethnicity; D005376:Financial Management; D015658:HIV Infections; D006262:Health; D006296:Health Services; D007390:International Agencies; D007391:International Cooperation; D009938:Organizations; D011057:Politics; D011153:Population; D011154:Population Characteristics; D015995:Prevalence; D012107:Research Design; D012432:Rwanda; D014480:United Nations; D014777:Virus Diseases; D014857:Warfare; D014944:World Health Organization
Acquired Immunodeficiency Syndrome--prevention and control; Africa; Africa South Of The Sahara; Blood Supply; Communicable Disease Control; Cultural Background; Delivery Of Health Care; Demographic Factors; Developing Countries; Diseases; Eastern Africa; Economic Factors; Equipment And Supplies; Ethnic Groups; Financial Activities; Foreign Aid; French Speaking Africa; Health; Health Services; Hiv Infections--prevention and control; International Agencies; Measurement; Organizations; Political Factors; Population; Population Characteristics; Prevalence; Rwanda; Un; Viral Diseases; War; Who