支气管哮喘的初级预防问题何权瀛尽管几年来在哮喘的治疗上有许多进展，但是哮喘的发病率并没有发生相应的预期的降低。相反最近２０年一些发达国家支气管哮喘的发病率反而增加，据分析其主要原因可能是由于外界环境因素发生了许多变化［１～３］。因此目前最重要的是必须... Primary prevention of bronchial asthma He Quanying Although there have been many advances in the treatment of asthma over the years, the incidence of asthma has not been the corresponding expected reduction. On the contrary, the incidence of bronchial asthma in some developed countries has increased on the contrary in the recent 20 years. According to the analysis, its main reason may be due to many changes in environmental factors [1-3]. So the most important thing right now is ...