Objective:To observe the clinic effects of Kechuanning asthma induced by virus and the effects on Th cytokine expression of random, 120 cases of children's asthma induced by virus were group (treatment group,n = 60)and Western Medicine group (control on preventing and curing children's in the patients. Methods:By means randomly divided into Kechuanning group,n = 60).The change of clinic symptom integral were observed in both groups after seven days. The contents of Thl cytokine IL-12 and Th2 cytokine IL-4 in blood serum were detected an...