TABLE 2.

Effect of binary ethylenimine inactivation on the viral hemagglutination assay titre.

Samples	Virus infectivity	HA titre (log2)
		2	4	8	16	32	64	128	256	512	1024	2048
PBS	-	-	-	-	-	-	-	-	-	-	-	-
IBS025	Live	+	+	+	+	+	+	+	+	+	+	-
BEI 21 h	Inactivated	+	+	+	+	+	+	+	+	+	-	-
BEI 48 h	Inactivated	+	+	+	+	+	+	+	+	+	-	-

BEI, binary ethylenimine; HA, hemagglutination assay; PBS, phospate buffered saline.