Table 1.
Time interval between vaccination with influenza A(H1N1) vaccine and/or seasonal influenza vaccines and first symptoms of GBS/FS
| Reports of influenza A(H1N1) vaccination | Reports of seasonal influenza vaccination | |||
|---|---|---|---|---|
| Days of exposure | BC levels 1–5 | BC levels 1–3 | BC levels 1–5 | BC levels 1–3 |
| 1–4 | 3 | 1 | 1 | - |
| 5–21 | 15 | 12 | 5 | 5 |
| 22–42 | 6 | 6 | 3 | 1 |
| 43–62 | 5 | 5 | 1 | 1 |
| 63–150 | 8 | 6 | 10 | 8 |
| Total within 150 days p.v. | 37 | 30* | 20 | 15* |
| >150 | 10 | 8 | 9 | 7 |
BC, Brighton Collaboration; GBS, Guillain-Barré syndrome; FS, Fisher syndrome; p.v., post-vaccination.
*
Out of these GBS/FS cases (BC levels 1–3), three patients received both influenza A(H1N1) vaccination and seasonal influenza vaccination during the study period within 150 days prior to the first symptoms of GBS/FS. None of these three patients were vaccinated with both vaccines on the same day.