Objective To study the effect on virus inhibition by Chlorogenic acid in vitro .Methods Utilizing the culture Hep 2 cell and the mixed experiment to observe the inhibited effect of Chlorogenic acid on commonly seen virus in respiratory tract infection.Results The concentration of Chlorogenic acid was 0.05mg/ml, 0.1 mg/ml,0.4mg/ml,0.8mg/ml respectively,it can respectively inhibit respiratory syncytia virus,Coxsackie B 3 virus,adeno associated 7 virus,adeno associated 3 virus and Coxsackie B 5 vi...