Table 1 Proportion of subjects with HAI ≥:1:40 at baseline (S1), 28 days post-vaccination (S2), and after influenza season (S3) and with seroconversion at S2, by influenza strain
Seroprotection | H1N1 | H3N2 | B |
|---|---|---|---|
% (N) | % (N) | % (N) | |
Baseline (S1) | 9% (44) | 48% (235) | 43% (214) |
28 days post-vaccination (S2) | 26% (126) | 82% (407) | 72% (354) |
After influenza season (S3) | 9% (46) | 59% (289) | 53% (263) |
Seroconversion | |||
28 days post-vaccination (S2) | 12% (60) | 45% (222) | 28% (138) |