title: WHO commemorates its 50th anniversary.
mesh_terms: D000569:Americas; D003695:Delivery of Health Care; D019049:Developed Countries; D003906:Developing Countries; D004194:Disease; D006262:Health; D006296:Health Services; D007114:Immunization; D007390:International Agencies; D008457:Measles; D009938:Organizations; D010175:Pan American Health Organization; D011051:Poliomyelitis; D011320:Primary Health Care; D014480:United Nations; D014777:Virus Diseases; D014944:World Health Organization
keywords: Americas; Delivery Of Health Care; Developed Countries; Developing Countries; Diseases; Health; Health Services; Immunization; International Agencies; Measles--prevention and control; Organizations; Paho; Poliomyelitis--prevention and control; Primary Health Care; Un; Viral Diseases; Who; World