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2009 H1N1 Flu: Situation Update

February 26, 2010

U.S. Situation Update

Weekly Flu Activity Estimates

Map of flu activity in the U.S.

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

Graph of U.S. patient visits reported for Influenza-like Illness (ILI).

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

Map of U.S. Influenza-like Illness (ILI)<br /> Reported by Regions.

U.S. Laboratory Confirmed Influenza-Associated Hospitalizations and Deaths from August 30, 2009 to February 20, 2010

Posted February 26, 2010, 11:00 AM ET
Data reported to CDC by February 23, 2010, 12:00 AM ET
Cases Defined by
Hospitali- zations
Deaths
Influenza Laboratory-Tests** 40,618 1,994

* 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.

 

International Situation Update

Map of International Activity Estimates
(Including 2009 H1N1 Flu)

This picture depicts a map of the world that shows the co-circulation of 2009 H1N1 flu and seasonal influenza viruses. The United States, Canada, Europe, Japan and China are depicted. There is a pie chart for each that shows the proportion of laboratory confirmed influenza cases that have tested positive for either 2009 H1N1 flu or other influenza subtypes. The majority of laboratory confirmed influenza cases reported in the United States, Canada, Europe, and Japan have been 2009 H1N1 flu.


Key Flu Indicators

February 26, 2010, 11:15 AM

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 February 14-20, 2010, most key flu indicators remained about the same as during 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.


More on the Situation


Background




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