The international view.
D000293:Adolescent; D002648:Child; D002662:Child Health Services; D002675:Child, Preschool; D003365:Costs and Cost Analysis; D003695:Delivery of Health Care; D004812:Epidemiologic Methods; D006801:Humans; D007167:Immunotherapy; D011315:Preventive Medicine; D012959:Socioeconomic Factors; D014944:World Health Organization