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Current Influenza Statistics
Influenza statistics are updated every Thursday at 10:00 a.m.  

OK H1N1 HOTLINE

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The Oklahoma State Department of Health (OSDH) has designated hospitalizations of patients with a laboratory test result indicating influenza as the diagnosis and influenza-associated deaths as reportable conditions beginning September 1, 2009 pursuant to the Oklahoma Reportable Disease Rules (Oklahoma Administrative Code Title 310, Chapter 515, Section 1-6).  OSDH will monitor reports of influenza-associated hospitalizations and deaths to better describe severe manifestations of influenza, monitor temporal trends of influenza-associated hospitalizations, and further evaluate risk factors for novel swine-origin influenza A H1N1 complications.

The purpose of the influenza statistics page is to provide weekly summaries of influenza information obtained from the OSDH influenza sentinel surveillance system, influenza test results from the OSDH Public Health Laboratory, and the number of influenza-associated hospitalizations and mortalities reported to the OSDH Acute Disease Service.  Influenza statistics will be updated every Thursday morning at 10:00 a.m.

Report for Week Ending January 30, 2010

  • 2.1% of outpatient visits statewide met the criteria for influenza-like illness1 (ILI) for the current reporting week which is similar to 2.0% reported during week ending January 23.
  • The proportion of outpatient visits due to ILI increased in the NW region from 3.9% to 4.7% during week ending January 30.  
  • 38.6% of respiratory syncytial virus (RSV) tests performed by sentinel laboratories were positive for this reporting period which is a decrease from 51.2% reported during week January 23.
  • 5 of 22 respiratory specimens tested at the OSDH Public Health Laboratory (PHL) were positive for swine-origin influenza A (H1N1).
  • Since September 1, the OSDH PHL has tested 1,604 specimens for influenza; 973 were positive for swine-origin influenza A (H1N1), 10 were positive for influenza B, and one was positive for influenza A (H3).  620 specimens tested negative for influenza or had insufficient RNA.  

Influenza Hospitalization Surveillance 
September 1, 2009 - January 30, 2010

  • 1,081 cases of influenza-associated hospitalizations were reported resulting in an incidence rate of 29.7 per 100,000 Oklahoma population.
  • 68 (6%) influenza-associated hospitalizations have occurred among women who were pregnant.
  • The age-specific incidence rate per 100,000 population of influenza-associated hospitalizations was highest for children less than 5 years of age (113) and children 5—18 years of age (41) compared to adults 19—24 years of age (21), 25-49 years of age (16), 50—64 years of age (22), and 65 years of age and older (18).
  • The race-specific incidence rate per 100,000 population of influenza-associated hospitalizations was highest for African Americans (55) and Native Americans (37) compared to persons who reported their race as White (26) and Asian (21).

Influenza-Associated Mortality Surveillance

  • 40 influenza-associated deaths were reported since surveillance began September 1, 2009; no new reports during January 24-30.

1Influenza-like illness is defined as having a fever (>100°F) combined with a cough and/or a sore throat

Change in Proportion of Influenza-like Illness Reported by Sentinel Physicians by Region
ADS-ILI Regional Map.jpg


Weekly Percent of Influenza-like Illness Based on Total Patient Visits to Sentinel Clinicians
ADS-ILI Clinicians Graph 2007-2010.jpg

Number of Influenza Hospitalizations by Age Group - Current Week
ADS-Thumbnail - Weekly Number of Influenza Hospita

Cumulative Number of Influenza Hospitalizations by Age Group
ADS-Thumbsail - Cumulative Number of Influenza Hos

Number of Influenza Hospitalizations by Admissions Week
ADS-Thumbnail - Number of Influenza Hospitalizatio

Number of Influenza Deaths by Week
ADS-Thumbnail - Number of Influenza Deaths by Week


Number of Reported Influenza-Associated Hospitalizations and Deaths,
Oklahoma, September 1, 2009 - January 30, 2010

Number of New Hospitalizations for Week Ending* January 30, 2010 Cumulative Hospitalizations Since September 1, 2009 Cumulative Deaths
Since September 1, 2009
5 1,081 40

* These units correspond to the number of weeks in a year and allow for a comparison between multiple seasons

For National Statistics from CDC on Reported H1N1 Flu Hospitalizations and Deaths: http://www.cdc.gov/h1n1flu/update.htm#totalcases

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