TABLE 1

Distribution of Hospital Admissions by Influenza Type and Season

Influenza TypeSeasona
2004–2005 (n = 392)2005–2006 (n = 373)2006–2007 (n = 368)2007–2008 (n = 496)2008–2009 (n = 378)2010–2011 (n = 671)2011–2012 (n = 588)2012–2013 (n = 889)2004–2013 (n = 4155)Matched B Seasonsb (n = 2320)Mismatched B Seasonsc (n = 1835)
Influenza A272 (69.4)231 (61.9)311 (84.5)313 (63.1)197 (52.1)451 (67.2)245 (41.7)625 (70.3)2645 (63.7%)1659 (71.5)986 (53.7)
Influenza B120 (30.6)142 (38.1)57 (15.5)183 (36.9)181 (47.9)220 (32.8)343 (58.3)264 (29.7)1510 (36.3%)661 (28.5)849 (46.3)
  • a Data are n (column %) unless otherwise indicated.

  • b 2004–2005, 2006–2007, 2010–2011, 2012–2013.

  • c 2005–2006, 2007–2008, 2008–2009, 2011–2012.