TABLE 1.

Detection of specific antibodies in control and 45W-4B-immunized pigs in trial 1

Group	OD492 value in ELISAa
	BI	15 days PI	40 days PI	55 days PI	75 days PI	105 days PI	117 days PI
A	0.19 ± 0.03	0.15 ± 0.01	0.16 ± 0.02	0.17 ± 0.03	0.15 ± 0.03	0.16 ± 0.01	0.16 ± 0.02
C	0.17 ± 0.03	0.74 ± 0.19b	1.37 ± 0.08b	2.21 ± 0.08b	2.12 ± 0.07b	1.65 ± 0.27b	1.18 ± 0.29b

^aBI, before immunization; OD₄₉₂, optical density at 492 nm.

^bP < 0.01, compared to PBS group.