TABLE 2.
Ferret antisera against human seasonal vaccine strains or candidate virus vaccines (CVVs) demonstrated variable recognition of the swine H1 1B.2.x lineagea
| Strain | Category | Clade | A/Iowa/32/2016 | A/Ohio/35/2017 | A/Michigan/383/2018 |
|---|---|---|---|---|---|
| A/Iowa/32/2016 | CVV | 1B.2.2.1 | 640 | 20 | 20 |
| A/swine/South Dakota/A01481702/2014 | Test | 1B.2.2.1 | 80 | 20 | 80 |
| A/swine/Minnesota/A02478597/2019 | Test | 1B.2.2.2 | 40 | 20 | 20 |
| A/Ohio/35/2017 | CVV | 1B.2.1 | 80 | 640 | 160 |
| A/Michigan/383/2018 | CVV | 1B.2.1 | 40 | 160 | 1,280 |
| A/swine/Illinois/A02139356/2018 | Test | 1B.2.1 | 20 | 320 | 1,280 |
a
Hemagglutination inhibition (HI) titers of CVV or human seasonal vaccine antisera against the contemporary North American swine 1B.2.x lineage. Homologous titers are highlighted in gray, and boxes mark titers against swine viruses of the same lineage.