Table 4. Estimated percentage reduction in infection rate as a result of targeted vaccination of all 2- and 3-year-old children.
| Age group | % reduction by season (95% CI)* | |||
|---|---|---|---|---|
| 2010–2011 | 2011–2012 | 2012–2013 | 2013–2014 | |
| 0–1 | 7.2 (6.4–8.3) | 11.3 (7.5–16.2) | 9.0 (5.8–13.6) | 15.8 (9.8–25.2) |
| 2–3 | 26.8 (26.1–27.7) | 28.6 (25.3–33.0) | 29.0 (26.4–32.7) | 28.6 (23.4–36.8) |
| 4 | 14.3 (13.6–15.3) | 17.4 (13.8–22.0) | 16.2 (13.3–20.3) | 20.0 (14.6–28.4) |
| 5–10 | 4.4 (3.6–5.3) | 6.1 (3.9–9.2) | 6.0 (4.0–8.3) | 5.0 (2.9–7.9) |
| 11–17 | 4.0 (4.8–3.2) | 5.2 (3.3–7.9) | 5.6 (3.9–7.8) | 4.5 (2.4–7.0) |
| 18–64 | 5.8 (4.7–7.1) | 10.2 (6.5–14.7) | 6.3 (4.2–8.9) | 8.5 (5.6–13.1) |
| 65+ | 5.7 (4.1–7.6) | 9.3 (5.8–13.3) | 6.4 (4.2–9.3) | 9.4 (4.9–16.15) |
*Reductions represents the percentage by which total infections were reduced in Scenario 2 (Scenario 1 for 2013–2014) in comparison to Scenario 1 (Scenario 2 for 2013–2014) by age group due to higher vaccination rates in 2- and 3- year- old children.
CI: confidence interval.