Objective: To investigate the curative effect of QingGan JieDu ZhiKe Prescription from Dezhou Hospital of Traditional Chinese Medicine on chronic cough after virus infection. Methods: Take the method of random,contrast,double blind for research. Divided patients that accorded with our research standards into treatment group and control group. Patients in the treatment group were treated by QingGan JieDu ZhiKe Prescription,meanwhile the control group was treated by budesonide and formoterol fumarate powder f...