Objective: To observe the effect of Kechuanning on Th cytokine expression in pediatric virus-induced asthma. Methods: 120 cases of pediatric virus - induced asthma were randomly divided into Kechuanning group (treatment group, n = 60, treated with Kechuanning) and Western medicine group (control group, n = 60, treated with virazole). The change of Thl cytokine IL-12 and Th2 cytokine IL-4 in blood serum were detected and analyzed. Results: Kechuanning could increase IL-12 but decrease IL-4 level in the patient's blood, therefore regulate...