Table 2.
Antigenic characterization of H3N2 influenza A viruses
| Reference viruses | Post‐infection sheep antisera | Genetic clade | |||
|---|---|---|---|---|---|
| A/Victoria/361/2011 | A/Texas/50/2012 | A/Switzerland/9715293/2013 | |||
| A/H3N2 vaccine strains | >1280 | >1280 | >1280 | ||
| Test viruses | |||||
| 2013‐2014 season isolates | A/Ansan/D765/2014 | 640 | 320 | 1280 | 3C.3a |
| A/Cheongju/G1532/2014 | 320 | 160 | 640 | 3C.3a | |
| A/Cheongju/G1629/2014 | 640 | 320 | 1280 | 3C.3a | |
| A/Ansan/D799/2014 | 320 | 160 | 1280 | 3C.3a | |
| A/Cheongju/G1739/2014 | 640 | 320 | 1280 | 3C.3a | |
| 2014‐2015 season isolates | A/Cheongju/G2156/2015 | >1280 | 1280 | >1280 | 3C.3a |
| A/Suwon/K98/2015 | 160 | 80 | 1280 | 3C.3a | |
| A/Ansan/D858/2015 | 320 | 160 | 1280 | 3C.3a | |
| A/Ansan/D906/2015 | 320 | 160 | 1280 | 3C.3a | |
| A/Cheongju/G1971/2015 | 160 | 80 | >1280 | 3C.3a | |
| A/Cheongju/G2103/2015 | 640 | 320 | 1280 | 3C.3a | |
| A/Seoul/A1284/2015 | 1280 | 1280 | 1280 | 3C.2a | |
| A/Seoul/A1251/2015 | 1280 | 640 | 1280 | 3C.2a | |
| A/Seoul/A1342/2015 | 80 | 40 | 80 | 3C.2a | |
| A/Ansan/D830/2015 | 160 | 80 | 160 | 3C.2a | |
| A/Seoul/A1299/2015 | 160 | 40 | 80 | 3C.2a | |
| A/Cheongju/G2477/2015 | 80 | 40 | 160 | 3C.2a | |