HPLC specific chromatogram spectrum-effect relationship for Shuanghuanglian on MDCK cell injury induced by influenza A virus (H1N1) Effects of Yinqiao detoxifcation oral liquid on NK cell viability and serum concentration of IFN-γ in SCID mouse infected by influenza virus FM1 Effect of theaflavin derivatives on influenza A virus Effect of Yunnan herb Laggera pterodonta against influenza A(H1N1)virus in vitro Inhibition of Hypericum perf oratum extract on influenza A virus Antiviral activity of Ouyi Antipyretic detoxicate soft capsule against influenza a virus H1N1 in vitro