Alerts for influenza were observed on multiple consecutive days during the fall wave of the H1N1 pandemic as well as during the peak of the 2010Á2011 influenza season. Peaks in weekly influenza hospitalizations appeared to correlate well temporally between the VA and CDC's AHDRA data (Fig. 1) . From October 1, 2009 to July 31, 2011 more than 12,500 CDI codes were identified among nearly 1.13 million hospitalizations with a calculated mean CDI rate of 11.1 per 1000 discharges (Fig. 2) . The CDI rate for FY10 was 78/100,000 population.