Fig. 8From: S1 domain of the porcine epidemic diarrhea virus spike protein as a vaccine antigenProtective efficacy of the vaccine. Litters from a vaccinated (n = 8) and a control sow (n = 7) were orally challenged with virulent PEDV at 4 days of age. Clinical (a), fecal scores (b), average weight (c) and survival of piglets (d) were evaluatedBack to article page