Fig. 6
From: S1 domain of the porcine epidemic diarrhea virus spike protein as a vaccine antigen
PEDV S1-specific antibody titers in piglets. a Piglet serum IgG titers were measured on the day of PEDV challenge by ELISA. The values represent the mean IgG titers of litters from a vaccinated sow (n = 8) and litters (n = 7) of an unvaccinated control sow. Error bars represent the standard deviation. b Virus-neutralizing antibody titers in sera from piglets at the day of PEDV challenge. The error bars represent the standard deviation of the mean. * means significantly different results (P < 0.001)