2009 H1N1 Flu Situation Update
August 21, 2009, 7:30 PM ET
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.
Map: Weekly Influenza Activity Estimates Reported by State and Territorial Epidemiologists
(Activity levels indicate geographic spread of both seasonal and 2009 influenza A [H1N1] viruses)
(Posted August 21, 2009, 7:30 PM ET, for Week Ending August 15, 2009)
For more details about the data in the map above, see the FluView Surveillance Report for the week ending August 15, 2009. For information about how this map is updated, see Questions & Answers About CDC's Online Reporting.
Percentage of Visits for Influenza-like Illness (ILI) Reported by the U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet), National Summary 2008-2009 and Previous Two Seasons
(Posted August 21, 2009, 6:00 PM ET, for Week Ending August 15, 2009)
Reporting States and Territories*
*Includes the District of Columbia, American Samoa, Guam, Puerto Rico and the U.S. Virgin Islands.
The number of hospitalized 2009 H1N1 cases and deaths presented in this table are an aggregate
CDC discontinued reporting of individual confirmed and probable cases of 2009 H1N1 infection on
International Human Cases of 2009 H1N1 Flu Infection