Table 1.

Experimental design for chicken immunization^a

Group	Antigen
1 (n = 8)	Inactivated PEDV vaccineb
2 (n = 8)	PEDV rS1-cFc immunogenc
3 (n = 4)	Placebod

^aCorresponding antigens were given intramuscularly to 10-week-old hens, followed by three booster inoculations at 3-week intervals

^bBEI-inactivated PEDV emulsified in ISA 70 adjuvant

^cPurified PEDV rS1-cFc protein emulsified in ISA 70 adjuvant

^dPBS emulsified in ISA 70 adjuvant