Table 1. Antigenic analysis of A/Sw/2016 and A/Sw/2017 in HI test. Assay was started from first dilution 1/10. The “5” value indicates the absence of cross-reactivity between virus and antisera (below the first dilution).
| A/New Caledonia/22/99 (H1N1) | A/Novosibirsk/653/2009 (H1N1) | A/California/07/2009 (H1N1)pdm09 | A/Sw/2016 | A/Sw/2017 | |
|---|---|---|---|---|---|
| A/NewCaledonia/22/99 (H1N1) | 320 | 160 | 5 | 5 | 5 |
| A/Novosibirsk/653/2009 (H1N1) | 40 | 640 | 5 | 5 | 5 |
| A/California/07/2009 (H1N1)pdm09 | 5 | 5 | 1280 | 5 | 5 |
| A/Sw/2016 | 5 | 5 | 5 | 320 | 160 |
| A/Sw/2017 | 5 | 5 | 5 | 160 | 640 |