Fig. 4From: Layered double hydroxide nanoparticles as an adjuvant for inactivated foot-and-mouth disease vaccine in pigsResults of immunized pigs. a Antibody level of immunized pig on the day 7 by ELISA. b Positive number of pigs at different times as showed by ELISA. The level of antibody titer of pig is above 1:32, which is considered as positive. c Titer of VNT at different times. Data are expressed as mean ± SD (n = 10). * p < 0.05, ** p < 0.01, *** p < 0.005Back to article page