小儿反复呼吸道感染(RRTI,简称易感儿)是儿科常见病、多发病,其临床特点是呼吸道感染常年反复发作,每次发作症状或轻或重,病程较长,缠绵难愈,严重影响小儿的生长发育和身心健康。中医学文献中并无此病名,根据临床表现可分属于“体虚感冒”、“肺炎喘嗽”、“哮喘”等肺系疾病, Children with recurrent respiratory tract infections (RRTI, referred to as susceptible children) is a common pediatric diseases, frequently-occurring disease, the clinical features of recurrent respiratory infections perennial, each attack symptoms or light or heavy, longer duration, difficult to cure, serious impact on children The growth and development and physical and mental health. There is no such name in the Chinese medical literature. According to the clinical manifestations, it can be classified as pulmonary diseases such as “Deficiency of the common cold”, “pneumonia cough”, “asthma”