Table 1.
Global avian influenza A virus subtypes reported in animal outbreaks from January 2013 to June 2022.
| Subtype | Subtype reported in animals (N=21,249), n (%) | |
| High pathogenicity avian influenza | 19,844 (93.39) | |
|
|
H5N1 | 10,079 (47.43) |
|
|
H5N2 | 1341 (6.31) |
|
|
H5N3 | 41 (0.19) |
|
|
H5N4 | 10 (0.05) |
|
|
H5N5 | 179 (0.84) |
|
|
H5N6 | 926 (4.36) |
|
|
H5N8 | 6722 (31.63) |
|
|
H5N9 | 25 (0.12) |
|
|
H5Nx | 333 (1.57) |
|
|
H7N1 | 1 (0.00) |
|
|
H7N2 | 2 (0.01) |
|
|
H7N3 | 137 (0.64) |
|
|
H7N7 | 15 (0.07) |
|
|
H7N8 | 1 (0.00) |
|
|
H7N9 | 32 (0.15) |
| Low pathogenicity avian influenza | 1405 (6.61) | |
|
|
H3N1 | 74 (0.35) |
|
|
H5N1 | 34 (0.16) |
|
|
H5N2 | 211 (0.99) |
|
|
H5N3 | 54 (0.25) |
|
|
H5N5 | 1 (0.00) |
|
|
H5N6 | 5 (0.02) |
|
|
H5N8 | 2 (0.01) |
|
|
H5N9 | 6 (0.03) |
|
|
H5Nx | 23 (0.11) |
|
|
H6Nx | 1 (0.00) |
|
|
H7N1 | 11 (0.05) |
|
|
H7N2 | 4 (0.02) |
|
|
H7N3 | 25 (0.12) |
|
|
H7N4 | 3 (0.01) |
|
|
H7N6 | 7 (0.03) |
|
|
H7N7 | 32 (0.15) |
|
|
H7N8 | 8 (0.04) |
|
|
H7N9 | 865 (4.07) |
|
|
H7Nx | 39 (0.18) |