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Hemagglutination‐inhibition titers (reciprocal geometric means) against four flu strains prior to infection by group of treatment. The flu strains 2, 3, and 4 were contained in the commercial vaccine
| Group | Strain | |||
|---|---|---|---|---|
| IA04* | 012XP** | 31XP*** | 69XP† | |
| Control | <10 | <10 | <10 | 13 |
| Heterologous | 14 | 305 | 232 | 485 |
| Homologous | 297 | 36 | <10 | <10 |
*Challenge strain A/Sw/0239/IA/04 H1N1 (IA04).
**A/Swine/North Carolina/031/05 H1N1 (012XP).
***A/Swine/Iowa/110600/00 H1N1 (31XP).
†A/Swine/Missouri/069/05 H3N2 (69XP).
