Inactivation of enveloped and nonenveloped viruses by EGCG and EGCG dimers. Each compound was used at a concentration of 100 μM and incubated for 1 h at pH 8.0. (A) Enveloped viruses: herpes simplex virus (HSV), vesicular stomatitis virus (VSV), Semliki Forest virus (SFV), respiratory syncytial virus (RSV), and measles virus (MV). (B) Nonenveloped viruses: coxsackie B4 virus (CVB4), coxsackie A9 virus (CVA9), poliovirus 1 (PV1), poliovirus 3 (PV3), and echovirus 6 (EV6). Viral titers are the means ± standard deviations of results of three separate experiments.