Fig. 2.

Effect of pH on the antiviral activity of monogallate and digallate tea flavonoids. Each compound was used at a concentration of 100 μM and incubated with virus from a clarified cell supernatant for 1 h at 37°C prior to titration with Vero cells. (A) HSV-1; (B) HSV-2; (C) VSV. Titers are the means ± standard deviations of results of three separate experiments.