2009 H1N1 Flu: International Situation Update This website is
archived for historical purposes and is no longer being
maintained or updated. For updated information on the current
flu season, see the CDC Seasonal Flu website. April 30, 2010,
5:00 PM ET This report provides an update to the international
flu situation using data collected through April 25, 2010, and
reported by the World Health Organization (WHO) on April 30. WHO
continues to report laboratory-confirmed 2009 H1N1 flu cases and
deaths on its Web page. These laboratory-confirmed cases
represent a substantial underestimation of total cases in the
world, as most countries focus surveillance and laboratory
testing only on people with severe illness. Currently, the most
active areas of 2009 H1N1 transmission are in parts of West and
Central Africa, and South and Southeast Asia. Localized flu
activity due to 2009 H1N1 continues to occur in tropical regions
of the Americas. Overall, influenza activity remains low in the
Northern Hemisphere. In Europe,