Table 2. Reciprocal HI titer of 12 H9N2 field isolates.

Virus	Antisera against different H9N2 field isolates
	YX/14	A615/15	YNKM/15	LP/15	CQ/16	SZQ60/15	XJ/14	ZYL/16	LFY/16	LMC/16	QZ/15	LB/13
SD696	64	64	256	64	256	32	128	128	128	64	128	16
SS	128	16	256	128	128	16	128	64	128	32	128	16
YX/14	2048*	128	2048	512	512	512	1024	512	256	512	128	32
A615/15	1024	512	2048	512	512	1024	4096	1024	512	512	128	32
YNKM/15	1024	256	4096	512	1024	1024	2048	512	1024	512	256	32
LP/15	512	256	1024	1024	512	1024	1024	512	256	256	128	64
CQ/16	1024	512	512	512	1024	512	512	256	512	128	64	64
SZQ60/15	1024	256	512	512	1024	1024	2048	512	1024	256	256	32
XJ/14	512	256	1024	512	512	1024	4096	1024	512	128	128	32
ZYL/16	512	128	256	128	128	512	1024	1024	1024	1024	1024	32
LFY/16	512	128	512	128	64	512	512	1024	1024	1024	1024	32
LMC/16	512	128	512	128	64	512	512	1024	2048	1024	1024	32
QZ/15	512	512	1024	256	128	64	256	1024	2048	1024	1024	32
LB/13	1024	128	1024	64	256	64	256	256	512	256	64	128

Note:

* means the HI titer against the homologous strains, the abbreviation for each virus was the same as in Fig 4.