NORWAY:20% of (2nd to 8th graders enrolled in school) showed indications / diagnoses of asthma. Source: Norway's Asthma and Allergy Association (NAAF). Nordlandsstudien (1995-2009 p: 6000)5% of children require medical treatment for asthma (estimate). 25-30% of youths have allergic symptoms.Source: the Norwegian Institute of Public HealthTANZANIA:
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