Table 3. Serum Antibody Responses to Influenza A (H7N7) Vaccinations1.
| Post Dose 1 | Post Dose 2 | |||||||||
| No. (%) ≥4-Fold Increase | No. (%) ≥1∶40 | No. (%) ≥4-Fold Increase | No.(%) ≥1∶40 | |||||||
| Dosage (µg HA)2 | No.3 | HAI4 | Neut4 | HAI4 | Neut4 | No.3 | HAI4 | Neut4 | HAI4 | Neut4 |
| 0 | 25 | 0 | 0 | 0 | 0 | 25 | 0 | 0 | 0 | 0 |
| 7.5 | 25 | 0 | 0 | 0 | 0 | 24 | 0 | 0 | 0 | 0 |
| 15 | 24 | 0 | 1 (4) | 0 | 1 (4) | 24 | 0 | 1 (4) | 0 | 1 (4) |
| 45 | 25 | 0 | 0 | 0 | 0 | 24 | 0 | 2 (8) | 0 | 2 (8) |
| 90 | 25 | 0 | 0 | 0 | 0 | 21 | 1 (5) | 2 (10) | 1 (5) | 2 (10) |
1
As determined at central laboratory; increase defined as ≥4-fold or <10 to 40.
2
As determined in single radial immunodiffusion assays.
3
Number of subjects in evaluation.
4
Hemagglutination-inhibition (HAI) and neutralizing (neut) antibody assays at central laboratory.