Table 1. Incidence of influenza-like illness (ILI) (×1000 inhabitants) at peak in the general population and by age group in the last 10 influenza epidemics (from 2004–2005 to 2013–2014) in Lombardy.

Season	Incidence of ILI (×1000 inhabitants) at epidemic peak
	General population		Age group
		0–4 y		5–14 y	15–64 y	≥65 y
2004–2005	12.04	26.86		29.81	11.85	5.16
	(2005–06)	(2005–07)		(2005–05)	(2005-–6)	(2005–07)
2005–2006	2.46	10.49		9.22	1.77	0.54
	(2006–12)	(2006–12)		(2006–12)	(2006–11)	(2006–11)
2006–2007	5.14	22.80		12.56	4.40	1.78
	(2007–06)	(2007–06)		(2007–05)	(2007–06)	(2007–07)
2007–2008	5.16	14.54		10.84	5.88	1.69
	(2008–02)	(2008–04)		(2008–04)	(2008–02)	(2008–02)
2008–2009	5.55	16.60		12.03	5.21	2.18
	(2009–05)	(2009–05)		(2009–04)	(2009–05)	(2009–06)
2009–2010	13.28	20.41		43.68	8.85	1.63
	(2009–44)	2009–45		2009–44	(2009–45)	(2009–45)
2010–2011	8.13	17.90		20.22	5.94	1.68
	(2011–05)	(2011–04)		(2011–05)	(2011–05)	(2011–05)
2011–2012	8.47	24.85		16.93	6.60	3.22
	(2012–05)	(2012–04)		(2012–04)	(2012–05)	(2012–06)
2012–2013	8.09	17.38		19.57	6.2	2.19
	(2013–05)	(2013–05)		(2013–05)	(2013–06)	(2013–06)
2013–2014	4.94	12.93		7.96	5.1	1.79
	(2014–06)	(2014–06)		(2014–06)	(2014–06)	(2014–02)

The weeks during which peak incidence was reported are in brackets..