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Average time spans of cases onset before and after vaccination
| Vaccination-onset status | Serotype | Proportion (%) | Average time span (days)a |
|---|---|---|---|
| Onset after vaccination | All tested | – | 326.6 |
| Onset after vaccination | EV-A71 | 6.6 (35/528) | 383.0 |
| Onset before vaccination | All tested | – | 152.0 |
| Onset before vaccination | EV-A71 | 6.9 (9/130) | 116.8 |
a The average time span between onset and closet vaccination time
