Allergies, especially asthma, as well as various other respiratory allergies, such as those affecting the nose and throat, are the most common of child illnesses. The rise in the rate of these "little" illnesses is closely linked to air pollution.
過敏性疾病是現在兒科的主要疾病，特別是氣喘、過敏性鼻炎等呼吸道過敏疾病，這類小病號的日益增加與空氣汙染關係密切。