Table 1. Influenza Activity by Season Reported by the US Centers for Disease Control and Prevention.

Season	ILI Activity		Influenza-Associated Hospitalizations, Cumulative Rate per 100 000 Population	Pneumonia and Influenza Mortality, No. of Deaths
	Median (Range), %	Month of Peak ILI
2010-2011	1.98 (0.38-8.51)	January	20.5	15 581
2011-2012	2.10 (0.43-6.62)	March	7.6	14 449
2012-2013	2.22 (0.11-10.13)	December	50.4	16 451
2013-2014	1.78 (0.57-6.81)	January	29.2	14 634

Abbreviation: ILI, influenza-like illness.