Table 1 Relationship between duration week from the lowest WSD week to the peak week and proportions of circulated type/subtype of influenza virus
Seasons | Lowest WSD week (a) | Peak week* (b) | Duration between (a) and (b), weeks | Prevalence of type or subtype of influenza virus in early phase of the season† | |||||
|---|---|---|---|---|---|---|---|---|---|
A/H3N2 | A/H1N1 | B | |||||||
1999/2000 | 51st, 1999 | 5th, 2000 | 6 | 45.2% | A/Sydney/5/97 | 54.8% | A/New Caledonia/20/99 | 0.0% | - |
2000/2001 | 48th, 2000 | 10th, 2001 | 14 | 14.3% | A/Panama/2007/99 | 43.4% | A/New Caledonia/20/99 | 42.3% | B/Sichuan/379/99 |
2001/2002 | 1st, 2002 | 8th, 2002 | 7 | 38.3% | A/Panama/2007/99 | 51.2% | A/New Caledonia/20/99 | 10.5% | B/Shandong/7/97 |
2002/2003 | 52nd, 2002 | 5th, 2003 | 5 | 85.4% | A/Fujian/411/2002 | 0.0% | -‡ | 14.6% | B/Shandong/7/97 |
2003/2004 | 52nd, 2003 | 6th,2004 | 6 | 98.6% | A/Fujian/411/2002 | 0.1% | - | 1.3% | B/Shanghai/361/2002 |
2004/2005 | 42nd, 2004 | 9th, 2005 | 20 | 35.4% | A/California/7/2004 | 3.7% | A/New Caledonia/20/99 | 60.9% | B/Shanghai/361/2002 |
2005/2006 | 6th, 2006 | 5th,2006 | -1§ | 83.0% | A/Wisconsin/67/2005 | 16.1% | A/New Caledonia/20/99 | 0.9% | B/Malaysia/2506/2004 |
2006/2007 | 49th, 2006 | 11th, 2007 | 14 | 49.0% | A/Brisbane/10/2007 | 9.2% | A/New Caledonia/20/99 ∣ A/Solomon Islands/3/2006 | 41.8% | B/Malaysia/2506/2004 |
2007/2008 | 39th, 2007 | 5th, 2008 | 18 | 5.4% | A/Brisbane/10/2007 | 93.0% | A/Solomon Islands/3/2006 | 1.6% | B/Florida/4/2006 |
2008/2009 | 44th, 2008 | 5th, 2009 | 13 | 28.1% | A/Brisbane/10/2007 | 61.8% | A/Solomon Islands/3/2006 | 10.1% | Brisbane/60/2008 |