TY - BOOK ED - World Health Organization. Regional Office for Africa TI - HIV/AIDS epidemiological: surveillance update for the WHO Africa n region : 2002 SN - 9290231009 PY - 2003/// CY - Geneva PB - World Health Organization KW - HIV infections KW - epidemiology KW - Acquired Immunodeficiency Syndrome KW - Epidemiologic surveillance KW - Data collection KW - methods N1 - Includes bibliographical references (p. 55-56) ER -