Table 1.
Antigenic analysis of the EAH1N1 SIVs
| Virus | HA group | Ferret antisera | ||
| SC/1/09 | SW/GX/18/11 | SW/GD/104/13 | ||
| SC/1/09 | 2009/H1N1 | 1280 | 320 | 10 |
| SW/GX/18/11 | 1 | 320 | 1280 | 20 |
| SW/GD/104/13 | 2 | 10 | 40 | 1280 |
| Test viruses | ||||
| SW/HuN/26/10 | 1 | 160 | 640 | 40 |
| SW/TJ/47/11 | 1 | 320 | 320 | 20 |
| SW/HeN/232/11 | 1 | 320 | 640 | 40 |
| SW/HLJ/27/12 | 1 | 320 | 1280 | 40 |
| SW/JS/49/12 | 1 | 160 | 640 | 40 |
| SW/HuN/30/13 | 1 | 160 | 1280 | 20 |
| SW/GD/30/13 | 1 | 320 | 640 | 20 |
| SW/GD/306/13 | 2 | 20 | 10 | 640 |
Ferrets were inoculated intranasally with 106 EID50 of the indicated virus, and sera were collected 3 wk postinoculation. Homologous titers are underlined and bolded.