Volume 14, Number 1—January 2008
Telephone Survey to Assess Influenza-like Illness, United States, 2006
|Influenza surveillance system||Data reported||Survey date†|
|29 Apr 2006 (wk 17)||20 May 2006 (wk 20)||14 Oct 2006 (week 41)|
|Sentinel Provider Network (SPN)||Outpatient visits||ILI rate = 1.2% (<2.2% national baseline)||ILI rate = 0.9% (<2.2% national baseline)||ILI rate =1.2% (<2.1% national baseline)|
|Emerging Infections Program (EIP)||Laboratory-confirmed influenza hospitalizations of children <18 years of age||1.08/10,000 (cumulative)||1.21/10,000||Not reported|
|New Vaccine Surveillance Network (NVSN)||Laboratory-confirmed influenza-associated hospitalizations of children <5 years of age||4.3/10,000 (cumulative)||5.4/10,000||Not reported|
|122 Cities Mortality Reporting System||Pneumonia and influenza deaths compared with all causes of death||7.1% < threshold 7.8%||6.3% < threshold 7.4%||5.6% < threshold 6.38%|
|National Notifiable Disease Surveillance System||Seasonal influenza-associated pediatric deaths reported by all state health departments||30||35||0|
|State and Territorial Epidemiologists Report||State-level assessments of influenza activity||Regional activity in 3 states (KY, NY, CT); focal activity in 4 states (HI, ME, MA, PA) and District of Columbia; sporadic or no activity in 48 states||Sporadic activity in 25 states; no Activity in 25 states||Local activity in 2 states (AL, HI); sporadic activity in 6 states (CA, ID, TX, FL, LA, NE); no activity in 43 states|
|National Respiratory and Enteric Virus Surveillance System||Predominant circulating virus||Influenza B||Influenza B||Influenza A|
|US WHO and Global Influenza Surveillance Network; National Respiratory and Enteric Virus Surveillance System (NREVSS)||Percentage of laboratory specimens positive and ILI positive for influenza virus||9.4||6.3||1.0|
*CDC, Centers for Disease Control and Prevention; ILI, influenza-like illness as defined by CDC (6,12); WHO, World Health Organization.
†Weeks 23, 30, 33, and 37 data were not available because CDC reported results only through week 20 in the 2005–06 influenza season and began reporting results on week 40 in the 2006–07 influenza season. The last day of the CDC week reports vary by several days from the last day of the survey results reported in Tables 3 and 4.