Incidence before varicella vaccination (per 1000 population) | Reduction since varicella vaccination* (%) | |||
USA | Uruguay | USA | Uruguay | |
<1 year | 19.7 | 14.3 | 68–81 | 63–80 |
1–4 years | 48.8 | 56.7 | 83–90 | 94–97 |
5–9 years | 34.5 | 41.6 | 63–77 | 73–81 |
10–14 years | 9.5 | 13.2 | 65–80 | 62–65 |
*Varicella vaccination started in the USA in 1995 and in Uruguay in 1999.