Age at the time of vaccination | Period of follow up | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
6 months | 12 months | 18 months | 24 months | ||||||||||
Vaccinated | Unvaccinated | Vaccinated | Unvaccinated | Vaccinated | Unvaccinated | Vaccinated | Unvaccinated | ||||||
18 months–4 years | 1 | 1 | 1 | 1 | 2 | 4 | 2 | 7 | |||||
5–9 years | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 2 | |||||
10–14 years | 0 | 0 | 0 | 2 | 0 | 3 | 0 | 3 | |||||
15–19 years | 0 | 5 | 0 | 8 | 0 | 8 | 0 | 10 | |||||
Total | 1 | 6 | 1 | 11 | 2 | 17 | 2 | 22 |