Figure 1From: Vaccination of influenza a virus decreases transmission rates in pigsPaired influenza A Multiscreen ELISA s/n values against the nucleoprotein of influenza virus two weeks after vaccination (prior to exposure) and at necropsy (bars represent the mean of s/n values (± SD) to influenza ■after vaccination, □ at necropsy. Positive s/n < 0.673; negative s/n > 0.673. a,b and z,y Statistically significant differences between paired samples for the NV and HE groups before exposure and at necropsy (p < 0.05).Back to article page