Table 2 Onset, end, duration and peak week of influenza season, 2006–2011. Influenza positivity rate by week and by month date
Year | Onset week (Month date) | End week (Month date) | Duration | Peak week (Month date) |
|---|---|---|---|---|
2006 | 24 (Jun 11–17) | 48 (Nov 26–Dec 2) | 25 | 29 (Jul 16–Jul 22) |
2007 | 25 (Jun 17–23) | 43 (Oct 21–27) | 19 | 27 (Jul 1–7) |
2008 | 25 (Jun 15–21) | 41 (Oct 5–11) | 17 | 30 (Jul 20–26) |
2010 | 24 (Jun 13–19) | 44 (Oct 31–Nov 6) | 21 | 33 (Aug 15–21) |
2011 | 31 (Jul 31–Aug 6) | 52 (Dec 25–31) | 22 | 33 (Aug 14–20) |
Median (week) | 25 | 44 | 21 | 30 |
Range | 24–31 | 41–52 | 17–25 | 27–33 |