TABLE 1.

Amino acids mutations between HK/1/68 and MA viruses

Gene	Mutation site (residue no.)	Amino acid
		HK/1/68	HK-MA
PB2	701	D	N
PB1	190	R	K
	578	K	T
PA	None
HA	218HA1	G	W
	156HA2	T	N
NP	34	D	N
NA	468	P	H
M1	232	D	N
M2	None
NS1	23	V	A
NS2	None