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Influenza A subtype by year*
| H1N1 (seasonal) n (%) (95% CI) | H3N2 n (%) (95% CI) | pH1N1 n (%) (95% CI) | |
|---|---|---|---|
| 2004–2005 | 0 (0) (0·0–39·0) | 6 (100) (61·0–100) | 0 (0) (0·0–39·0) |
| 2005–2006 | 0 (0) (0·0–5·8) | 63 (100) (94·3–100) | 0 (0) (0·0–5·8) |
| 2006–2007 | 25 (86) (69·4–95·0) | 4 (14) (5·5–30·6) | 0 (0) (0·0–11·7) |
| 2007–2008 | 19 (37) (24·8–50·1) | 33 (63) (49·9–75·2) | 0 (0) (0·0–6·9) |
| 2008–2009 | 29 (16) (11·5–22·3) | 20 (11) (7·4–16·6) | 130 (73) (65·7–78·6) |
*CI, confidence interval.
