Table 2. Infection rate by strain for each season in the study; Dominating strain highlighted in bold.

Strain	Infection rate as a percentage of total population (95% CI)
	2010–2011	2011–2012	2012–2013	2013–2014
AA/H1N1 pdm09	30.2 (28.5–31.9)	2.0 (1.6–2.4)	6.1 (4.6–7.5)	4.5 (3.4–5.6)
AA/H1N1	3.6 (2.6–4.8)	0.0 (0.0–0.0)	7.3 (6.5–8.0)	0.5 (0.2–1.0)
AA/H3	4.7 (3.8–5.6)	5.0 (4.2–6.0)	11.3 (9.8–12.7)	2.0 (1.4–2.7)
B	13.5 (12.2–15.0)	3.1 (2.3–4.0)	20.7 (19.2–22.1)	0.9 (0.4–1.4)

CI: confidence interval.