Table 2.

Cross-host transmission sites and pathogenic sites of internal genes.

Strain	PB2				PB1	PA			NP	M2	NS1
	292	588	627	701	577	356	404	672	105	31	106
CK/TZ/319/18	V	V	E	D	K	R	A	L	V	N	I
CK/XZ/875/18	V	V	E	D	K	R	A	L	V	N	I
CK/YZ/255/18	V	V	E	D	K	R	A	L	V	N	I
CK/WF/404/18	I	V	E	D	K	R	S	L	V	N	I
CK/FY/297/18	V	V	E	D	K	R	A	L	V	N	I
CK/FY/338/18	V	V	E	D	K	R	A	L	V	N	I
CK/XZ/968/18	V	V	E	D	K	R	A	L	V	N	I
CK/LY/977/19	V	V	E	D	K	R	A	L	V	N	I
CK/TA/146/18	V	V	E	D	K	R	A	L	V	N	I
CK/CZ/1806/19	V	V	E	D	K	R	A	L	V	N	I
CK/AH/1066/18	V	V	A	D	K	R	A	L	V	N	I
CK/CZ/325/18	I	V	A	D	K	R	S	L	V	N	I
CK/CZ/1020/19	V	V	E	D	K	R	A	L	V	N	I
CK/CZ/1149/18	V	V	E	D	K	R	A	L	V	N	I
CK/YZ/1025/19	V	V	E	D	K	R	A	L	V	N	I
CK/CZ/292/18	V	V	E	D	K	R	A	L	V	N	I
CK/FY/439/18	V	V	V	D	K	R	A	L	V	N	I
CK/CZ/424/18	V	V	E	D	K	R	A	L	M	N	I
CK/FY/901/19	I	V	E	D	K	R	A	L	V	N	I
CK/HF/316/18	V	V	E	D	K	R	A	L	V	N	I
CK/XZ/1078/19	I	V	E	D	K	R	A	L	V	N	I
CK/YZ/628/19	V	V	E	D	K	R	S	L	V	N	I
CK/FY/869/19	I	V	E	D	K	R	A	L	V	N	I
CK/XZ/1003/19	I	V	E	D	K	R	A	L	V	N	I
CK/FY/177/19	V	V	E	D	K	R	A	L	V	N	I
CK/CZ/548/19	I	I	V	D	K	R	A	L	V	N	I
CK/HZ/46/19	V	V	E	D	K	R	A	L	V	N	I
CK/SD/S32/19	V	V	E	D	K	R	A	L	V	N	I
CK/CZ/913/19	I	V	E	D	K	R	A	L	V	N	I
CK/SH/49/19	I	V	V	D	K	R	A	L	V	N	I
CK/CZ/928/19	V	V	E	D	K	R	A	L	V	N	I
CK/BJ/1/94∗	I	A	E	D	K	K	A	L	V	S	I
CK/SD/6/96∗	I	A	E	D	K	K	A	F	V	S	I
DK/HK/Y280/97∗	I	A	E	D	K	K	A	L	V	S	I
QA/HK/G1/97∗	V	A	E	D	K	K	A	L	V	S	I
CK/HK/G9/97∗	V	A	E	D	K	K	A	L	V	S	I
DK/HK/Y439/97∗	I	A	E	D	K	K	A	L	M	S	M
CK/SH/F/98∗	I	A	E	D	K	K	A	L	V	N	I

An asterisk (∗) indicates reference strains.