Fig. 3
Association between the surface tension decreasing effects and the antiviral effects of the vaginal gels. a Surface tension decreasing activity of the tested gels. Surface tension decrease was calculated by subtraction of surface tension in the minimum gel concentration and surface tension in the maximum gel concentration. Insert shows surface tension decrease by Gel-4 as a function of log10 gel concentration. b Correlation between the surface tension decreasing activity and the average HSV-2 replication measured at the maximum gel concentration. Pearson correlation coefficient is also shown