Table 1. Number of swabbed ARI and influenza cases, and percentages attributable to different influenza virus types and subtypes/lineages, in the IBVD (Influenza B in Vircases database) study.
France, 2003–2004 to 2012–2013.
| Season | Duration (week start-end of influenza epidemic) | ARI cases | Influenza cases | A (a) | B (a) | A(H1N1) | A(H3N2) | A(H1N1) pdm09 | A not subtyped | B Victoria | B Yamagata | B not characterized |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2003–2004 | 7 (47/2003-01/2004) | 2432 | 874 | 100.0% | 0.0% | 0.7% | 88.8% | 0.0% | 10.5% | - | - | - |
| 2004–2005 | 10 (03/2005-12/2005) | 3262 | 975 | 90.3% | 9.7% | 9.5% | 61.5% | 0.0% | 29.0% | 5.3% | 51.6% | 43.2% |
| 2005–2006 | 9 (03/2006-11/2006) | 4139 | 840 | 37.6% | 62.4% | 79.4% | 0.0% | 0.0% | 20.6% | 62.2% | 7.6% | 30.2% |
| 2006–2007 | 5 (04/2007-08/2007) | 3841 | 945 | 100.0% | 0.0% | 2.0% | 72.7% | 0.0% | 25.3% | - | - | - |
| 2007–2008 | 7 (02/2008-08/2008) | 4254 | 1240 | 65.2% | 34.8% | 68.9% | 0.0% | 0.0% | 31.1% | 0.7% | 58.3% | 41.0% |
| 2008–2009 | 10 (50/2008-07/2009) | 3929 | 1365 | 84.8% | 15.2% | 2.4% | 70.6% | 0.0% | 26.9% | 49.8% | 5.8% | 44.4% |
| 2009–2010 | 7 (47/2009-53/2009) | 7630 | 2749 | 100.0% | 0.0% | 0.0% | 0.0% | 95.9% | 4.1% | - | - | - |
| 2010–2011 | 10 (51/2010-08/2011) | 4347 | 1884 | 52.7% | 47.3% | 0.0% | 10.0% | 79.6% | 10.5% | 28.3% | 1.8% | 69.9% |
| 2011–2012 | 5 (05/2012-09/2012) | 3198 | 1279 | 96.2% | 3.8% | 0.0% | 92.5% | 4.4% | 3.1% | 30.6% | 36.7% | 32.7% |
| 2012–2013 | 11 (51/2012-09/2013) | 4025 | 2272 | 45.1% | 54.9% | 0.0% | 41.4% | 53.0% | 5.6% | 5.9% | 69.7% | 24.4% |
(a) These include all influenza cases, including those that were not subtyped/characterized.