Table 1. Comparison of clade classifications in the current and previous studiesa.
| Segment | Previous clade | Current clade |
|---|---|---|
| HA | n=4 (BJ/94, G1, Unknown avian, Korea) | n=16 (clade 0–clade 15) |
| NA | n=3 (BJ/94, G1, Korea) | n=4 (clade 0–clade 3) |
| PB2 | n=9 (BJ/94, Korea, Dk1, Dk2, GX, F/98, H5N1-GS/GD, H5N1-Z, G1) | n=9 (clade 0–clade 8) |
| PB1 | n=7 (BJ/94, G1, Dk1, Dk2, Dk3, H5N1-like, F/98) | n=6 (clade 0–clade 5) |
| PA | n=8 (H5N1-like, BJ/94, G1, Swine, Dk1, Dk2, Unknown avian, F/98) | n=8 (clade 0–clade 7) |
| NP | n=6 (BJ/94, G1, Dk, Aq, Ty/66, F/98) | n=7 (clade 0–clade 6) |
| M | n=3 (BJ/94, G1, Dk) | n=4 (clade 0–clade 3) |
| NS | n=3 (BJ/94, G1, Dk) | n=8 (clade 0–clade 7) |
Abbreviations: Beijing, BJ; duck, Dk; Guangdong, GD; goose, Gs; Hong Kong, HK; turkey, Ty.
a
The previous clade classification was referred to ref.14