CDC H1N1 Flu Website Situation Update, January 23, 2010

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Title: CDC H1N1 Flu Website Situation Update, January 23, 2010

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CDC H1N1 Flu Website Situation Update, January 23, 2010

Key Flu Indicators

Each week CDC analyzes information about influenza disease activity in the United States and publishes findings of key flu indicators in a report called FluView. During the week of January 10-16, 2010, all key indicators, except for one, declined compared to the previous week. Below is a summary of the most recent key indicators:

*All data are preliminary and may change as more reports are received.

Learn more >> 

U.S. Situation Update

Weekly Flu Activity Estimates

U.S. Patient Visits Reported for Influenza-like Illness (ILI)

U.S. Influenza-like Illness (ILI) Reported by Regions

Laboratory Confirmed Influenza-Associated Hospitalizations
and Deaths from August 30 2009 to January 16, 2010

Posted January 22, 2010, 11:00 AM ET
Data reported to CDC by January 19, 2010, 12:00 AM ET
Cases Defined by
Hospitalizations
Deaths
Influenza Laboratory-Tests** 38,989 1,812

*Reports can be based on syndromic, admission or discharge data, or a combination of data elements that could include laboratory-confirmed and influenza-like illness hospitalizations.

*Laboratory confirmation includes any positive influenza test (rapid influenza tests, RT-PCR, DFA, IFA, or culture), whether or not typing was done.

The table shows aggregate reports of all laboratory confirmed influenza hospitalizations and deaths (including 2009 H1N1 and seasonal flu) since August 30, 2009 received by CDC from U.S. states and territories**. This table will be updated weekly each Friday at 11 a.m. For the 2009-2010 influenza season, states are reporting based on new case definitions for hospitalizations and deaths effective August 30, 2009.

CDC will continue to use its traditional surveillance systems to track the progress of the 2009-2010 influenza season. For more information about influenza surveillance, including reporting of influenza-associated hospitalizations and deaths, see Questions and Answers: Monitoring Influenza Activity, Including 2009 H1N1.

The number of 2009 H1N1 hospitalizations and deaths reported to CDC from April – August 2009 is available on the Past Situation Updates page.

For state level information, refer to state health departments.

International Human Cases of 2009 H1N1 Flu Infection
See: World Health Organization.

**States report weekly to CDC either 1) laboratory-confirmed influenza hospitalizations and deaths or 2) pneumonia and influenza syndrome-based cases of hospitalization and death resulting from all types or subtypes of influenza. Although only the laboratory confirmed cases are included in this report, CDC continues to analyze data both from laboratory confirmed and syndromic hospitalizations and deaths.

 

U.S. Influenza-associated Pediatric Mortality
Posted January 22, 2010 (Updated Weekly)
Data reported to CDC by January 16, 2010
Date Reported
Laboratory-Confirmed 2009 H1N1 Influenza Pediatric Deaths
Laboratory-Confirmed Influenza A Subtype Unknown Pediatric Deaths
Laboratory-Confirmed
Seasonal
Influenza
Total
This Week (Week 2, January 10 to January 16, 2010) 3 4 2 9
Since August 30, 2009 198 44 1 243
Cumulative since April 26, 2009 258 47 2 307

This table is based on data reported to CDC through the Influenza-Associated Pediatric Mortality Surveillance System. Influenza-associated deaths in children (persons less than 18 years) was added as nationally notifiable condition in 2004.

For more information about influenza-associated pediatric mortality, see FluView.

For more information about the U.S. situation, see the CDC H1N1 Flu U.S. Situation page.

International Situation Update

For more information about the international situation, see the CDC H1N1 Flu International Situation page.

Recent Updates of Interest

Additional Updates on the CDC H1N1 Flu Website

To learn about other recent updates made to the CDC H1N1 Flu Website, please check the "What's New" page on the CDC H1N1 Flu website.


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