Influenza Surveillance Data 2007-08
Statewide Temporal Trend of Influenza-Like Illness
Weekly Influenza-Like Illness Totals
Influenza Activity
Type of Influenza Isolates Confirmed
Sentinel Provider Data
FAQs, Protocol, Form
West Virginia Immunization Program
National Immunization Program
Influenza-like Illness Weekly Reporting Form (PDF, 68kb)
(for Local Health Department use only!)
Statewide Temporal Trend of Influenza-Like Illness by MMWR Week
(2004-05, 2005-06, 2006-07 and 2007-08 Seasons)
The figure below displays the number of influenza-like illness cases reported during the 2004-05, 2005-06, 2006-07 and 2007-08 influenza seasons. Illness is defined as fever > 100˚ F AND cough and/ or sore throat without another identified cause. ILI can be caused by a variety of respiratory viruses, so data should always be interpreted in the context of laboratory data. ILI cases are reported by physicians to local health departments. Local health departments report the data weekly to the state.
All counties can view the weekly total number of influenza-like illness cases reported by the local health department by selecting a year below (requires Adobe Acrobat 3.0 or greater):
Influenza Activity in West Virginia, 2007-08 flu season
Sporadic: Isolated cases of lab confirmed influenza in the state; Influenza-Like-Illness (ILI) activity is not increased. Or a lab confirmed outbreak in a single institution (nursing home, hospital, prison, school, etc) in the state; ILI activity is not increased.
Local: Increased ILI within a single region and recent (within the past 3 weeks) laboratory evidence of influenza in that region. ILI activity in other regions is not increased. Or two or more institutional outbreaks (ILI or lab confirmed) within a single region and recent (within the past 3 weeks) lab confirmed influenza in that region. Other regions do not have increased ILI and virus activity is no greater than sporadic in those regions.
Regional: Increased ILI in ≥ 2 but less than half of the regions and recent (within the past 3 weeks) lab confirmed influenza in the affected regions. Or institutional outbreaks (ILI or lab confirmed) in ≥ 2 and less than half of the regions and recent (within the past 3 weeks) lab confirmed influenza in the affected regions.
Widespread: Increased ILI and/or institutional outbreaks (ILI or lab confirmed) in at least half of the regions and recent (within the past 3 weeks) lab confirmed influenza in the state.
Type (A or B) of Influenza and MMWR Week of Occurrence
The figure below displays the number of influenza-like illness cases reported by local health departments during the 2007-08 influenza season along with the number of laboratory confirmed influenza cases (type A and type B) as reported by sentinel laboratories in the state of West Virginia. Sentinel laboratories confirm cases by culture or antigen detection by direct immunofluorescence. Rapid test results are not included.
West Virginia Sentinel Provider Data, 2007-08 Season
The map below shows West Virginia counties that have enrolled influenza sentinel providers for the 2008-09 season.
The figure below demonstrates the percent of visits for influenza-like illness (ILI) reported by West Virginia sentinel providers during the 2008-09 influenza season.
FAQs, Protocol, and Reporting Form
This page was last updated 8/8/2008.