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Data on the burden of physical illness specifically among adolescents are scarce. Major new insights about the ways in which adolescents differ from both children and adults have emerged from a diverse range of research.1 Upper respiratory infections are the most common cause of visits to paediatrician clinics among children and acute nasopharyngitis is the most frequent upper respiratory infection.2
To estimate the burden of acute nasopharyngitis among adolescents, a cross-sectional prospective population-based investigation was conducted in Salvador, northeast Brazil, from November 2002 to July 2003. Adolescents (aged 10–19 years) were randomly recruited at school. Data were collected by interview using a standard questionnaire …