Figure 4

Neutralising activity of different concentrations of plant extracts against influenza A virus A/Teal/Tunka/7/2010 (H3N8). Red line – specific antibodies to the H3 subtype of influenza A virus; green – non-treated virus; blue – virus treated with the corresponding plant extract. The data reflect the mean values of four independent repeats of the PRNT assay as described in the Methods; error bars show standard deviations. The correlation coefficients R between the reciprocal dilution of extracts and infectivity of A/Teal/Tunka/7/2010 (H3N8) are shown in each panel. The correlation was assumed to be statistically significant at R > 0.7 (p = 0.05).