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Number of Sera From Responders to Influenza B Virus From the B/Victoria-Like Lineage (B/Vic) and Influenza B Virus From the B/Yamagata-Like Lineage (B/Yam), by Age
| Responders by Age, No. | |||||||
|---|---|---|---|---|---|---|---|
| Variable | 1 y | 2 y | 3 y | 4 y | 5 y | 6 y | 7 y |
| B/Vic responders (n = 18) | 1 | 2 | 2 | 2 | 2 | 5 | 4 |
| B/Yam responders (n = 23) | 2 | 3 | 3 | 3 | 4 | 5 | 3 |
