CDC 2009 H1N1 Flu | 2009 H1N1 Flu: International Situation Update

2009 H1N1 Flu: International Situation Update
September 11, 2009, 6:00 PM ET
Map of International Activity Estimates
(Including 2009 H1N1 Flu)

This situation report provides an update to the international situation as of September 11th, 2009. As of September 6th, the World Health Organization (WHO) regions have reported over 277,607 laboratory-confirmed cases of 2009 H1N1 influenza virus (2009 H1N1) with at least 3,205 deaths, which is an increase of over 23,401 cases and at least 368 deaths since August 30th. The laboratory-confirmed cases represent a substantial underestimation of total cases in the world as many countries focus surveillance and laboratory testing only on persons with severe illness. The 2009 H1N1 influenza virus continues to be the dominant influenza virus in circulation in the world. Decreasing trends in disease due to 2009 H1N1 continue to be reported in most of South America and Australia. In contrast, more African countries have reported their first laboratory confirmed cases.

Selected Highlights
The 2009 H1N1 influenza virus is the predominant influenza virus in circulation worldwide.
The epidemiology of the disease caused by the 2009 H1N1 influenza virus in the Southern Hemisphere is very similar to that described in the United States this past spring.

There have been no significant changes detected in the 2009 H1N1 influenza virus isolated from persons in the Southern Hemisphere as compared to viruses isolated from persons in the Northern Hemisphere.

In August, a White House report was prepared by the Department of Health and Human Services (HHS) in coordination with the Office of the Director for National Intelligence (ODNI) and the Department of State (Dos) and describes the characteristics and impact of 2009 H1N1 influenza A virus in the Southern Hemisphere. The full report can be accessed by the link provided in the Reports and Publications section below.

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CDC 2009 H1N1 Flu | 2009 H1N1 Flu: International Situation Update