Purpose:To research the effect of Kechuanning Oral liquid on the expression of P13K in the cells ofCD4+T、CD8+T about RSV-induced asthma,and to further elucidate the mechanism of Kechuanning Oral liquidpreventing and treating the asthma induced by virus.Methods:Totally infancy 40 rates were randomly divided intofour groups,these are phosphate-buffered saline(PBS)control group,model group,dexamethasone with salbutamolgroup,and Kechuanning Oral liquid group.We builded rat model of asthma induced by ovalbumin and stimulatedasthma with respirat...