儿科医生在临床中经常遇到这样一些小患者,他们反复感冒发烧、咳嗽、流涕,病程一般都在一周左右,冬春季几乎每个月都要来医院。尤其是一些体弱儿和刚入幼儿园的孩子,往往是这次感冒刚好,送去幼儿园,不巧幼儿园内有几个孩子感冒、咳嗽的,就又被感染上。在儿科门诊,这些患儿家长常常问医生:“为什么我孩子总是感冒?”什么是复感儿反复发生呼吸道感染的小儿,简称为“复感儿”。多数是由于先天或后天等各种原因引起的,如小儿体质弱、免疫功能低下、营养不良、贫血、护理不当,或者患 Pediatricians often encounter in clinical such small patients, they repeatedly have a cold, cough, runny nose, the course of the disease are generally about a week, almost every winter and spring to the hospital. In particular, some frail children and children entering the kindergarten are often caught in a cold and sent to kindergartens. Unfortunately, a few children in the nursery catch a cold and cough and they are infected. In pediatric outpatient, parents of these children often ask the doctor: “Why is my child always cold? ” What is recurrent children with respiratory tract infection, referred to as . Most are due to innate or acquired and other causes, such as infantile physical weakness, immune dysfunction, malnutrition, anemia, improper care, or suffering from