Rates of Hospitalization for Laboratory-Confirmed Influenza, by Age Group and Surveillance Week — FluSurv-NET,* 2013–14†

* = FluSurv-NET conducts population-based surveillance for laboratory-confirmed influenza-associated hospitalizations in children aged <18 years (since the 2003–04 influenza season) and adults aged ≥18 years (since the 2005–06 influenza season). The FluSurv-NET covers approximately 80 counties in the 10 Emerging Infections Program states (California, Colorado, Connecticut, Georgia, Maryland, Minnesota, New Mexico, New York, Oregon, and Tennessee) and additional Influenza Hospitalization Surveillance Project states (Michigan, Ohio, and Utah).

† = Data reported as of February 14, 2014.

Source: Centers for Disease Control and Prevention: Update: Influenza Activity – United States, September 29, 2013–February 8, 2014