Table 2 Average time spans of cases onset before and after vaccination
From: Changing serotypes of hand, foot and mouth disease in Shanghai, 2017–2019
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 |