conclusion: the efficacy of bcg-psn in treating child bronchial asthma is sure, but limited by time.
结论:bcg鄄psn治疗儿童哮喘的疗效确切,但具有时效性。
objective: to enhance the prevention of the child bronchial asthma and its treatment result by giving health education to children who had bronchial asthma and their parents.