TABLE 1.

Summary of observed vaccine efficacies^a

Vaccine strain	Dose	DOC	Plasma virus RNA at DOC	EIAV challenge strain	No. of animals protected/no. tested (%)
					Protection from clinical disease	Protection from infection
EIAVUKΔS2	105	6	102-104	PV	8/8 (100)	8/8 (100)
EIAVUKΔS2/DU	105	6	<102-103	PV	7/8 (87.5)	2/8 (25)
EIAVPRΔS2	105	6	<102	PV	6/8 (75%)	0/8 (0)
EIAVUKΔS2	105	2	102	PV	3/5 (60)	1/5 (20)
Control	NA	NA	NA	PV	0/6 (0)	0/6 (0)

^aDOC, day of challenge.