title: Twenty years of EPI.
mesh_terms: D000569:Americas; D003695:Delivery of Health Care; D019049:Developed Countries; D003906:Developing Countries; D006262:Health; D006296:Health Services; D007114:Immunization; D007390:International Agencies; D007391:International Cooperation; D009934:Organization and Administration; D009938:Organizations; D010175:Pan American Health Organization; D011320:Primary Health Care; D014480:United Nations; D014944:World Health Organization
keywords: Americas; Coordination; Delivery Of Health Care; Developed Countries; Developing Countries; Health; Health Services; Immunization; International Agencies; International Cooperation; Organization And Administration; Organizations; Paho; Primary Health Care; Un; Who