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North Carolina Influenza Update

2009-2010 Flu Season

Printable version (PDF)

Figure 1. Influenza-Like Illness (ILI) surveillance in hospital emergency departments (ED) and outpatient clinics participating in the influenza sentinel provider network (SPN), by week.

Influenza-Like Illness surveillance in hospital emergency departments and outpatient clinics participating in the influenza sentinel provider network, by week.

 

Figure 2. Influenza positive tests by the NC State Laboratory of Public Health and the total percent of submitted specimens that are positive by week.

Influenza Positive Tests Reported by the North Carolina State Laboratory of Public Health by Week

 

Table 1. NC Flu-Associated Hospitalizations and Deaths

February 2, 2010 – 11:00 a.m.


Hospitalizations for ILI (Influenza-Like Illness) 1/24/10-1/30/10		 New Flu Deaths 1/24/10-1/30/10 Total Flu Deaths
Since April 2009*
407 1 83

*Includes H1N1 flu deaths April - Sept. 26, 2009 (13) and all flu deaths since Sept. 27, 2009

Starting Sept. 27, 2009 North Carolina expanded reporting of flu deaths and hospitalizations to cover all hospitalizations for influenza-like illness (ILI) and all deaths related to influenza, whether seasonal flu or pandemic H1N1 flu. As of Sept. 26, 2009, a total of 13 deaths and 267 hospitalizations attributed to laboratory-confirmed pandemic H1N1 flu had been reported in North Carolina.

Influenza-associated deaths are based on reports from doctors and local health departments of people who died from an illness identified as influenza (either seasonal or pandemic) through medical testing. In previous years, only pediatric flu deaths were reported. Reporting of all flu-related deaths, including those in adults, is now required.

Hospitalizations for influenza-like-illness (ILI) are based on electronic monitoring of the number of patients with ILI who are admitted to hospitals through emergency departments. ILI is not the same as laboratory confirmed influenza. Patients who are identified as having ILI might have other diseases, so this number may overestimate the actual number of influenza hospitalizations, but is useful for monitoring trends.

To view numbers of Influenza-Like Illness Hospitalizations from previous weeks, please see the Weekly Influenza Surveillance Summary.

 

Figure 3. Annual ILI trends from the influenza sentinel provider network for 2005 – 2010.

Graph illustrating the percentage of visits for ILI

 

Figure 4. Influenza-Associated Deaths Reported in North Carolina, by Week of Death

Graph of Influenza-Associated Deaths Reported in North Carolina, by Week of Death

 

Figure 5. Influenza-Associated Deaths Reported in North Carolina, by Age Group

Graph of Influenza-Associated Deaths Reported in North Carolina, by Age Group

 

Weekly influenza statistical report summaries for previous years

 




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Page last updated on February 04, 2010