Content on this page was developed during the 2009-2010 H1N1 pandemic and has not been updated.

The H1N1 virus that caused that pandemic is now a regular human flu virus and continues to circulate seasonally worldwide.
The English language content on this website is being archived for historic and reference purposes only.
For current, updated information on seasonal flu, including information about H1N1, see the CDC Seasonal Flu website.

Novel H1N1 Flu Situation Update
July 31, 2009, 11:00 AM ET

Map: Weekly Influenza Activity Estimates Reported by State and Territorial Epidemiologists
(Activity levels indicate geographic spread of both seasonal and novel influenza A [H1N1] viruses)
(Posted July 24, 2009, 2:00 PM ET, for Week Ending July 18, 2009)

For more details about the data in the map above, see the FluView Surveillance Report for the week ending July 18, 2009. For information about how this map is updated, see Questions & Answers About CDC's Online Reporting.

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

Total U.S. Novel H1N1 Flu Hospitalizations and Deaths
Posted July 31, 2009, 11:00 AM ET
Data reported to CDC by July 30, 2009, 11:00 AM ET
Reporting States and Territories*	Hospitalized Cases	Deaths
47	5,514	353
*Includes the District of Columbia, American Samoa, Guam, Puerto Rico and the U.S. Virgin Islands. The number of hospitalized novel H1N1 cases and deaths presented in this table are an aggregate of reports received by CDC from U.S. states and territories and will be updated weekly each Friday at 11am. For state level information, refer to state health departments. CDC discontinued reporting of individual confirmed and probable cases of novel H1N1 infection on July 24, 2009. CDC will report the total number of hospitalizations and deaths weekly, and continue to use its traditional surveillance systems to track the progress of the novel H1N1 flu outbreak. For more information about CDC’s novel H1N1 influenza surveillance system, see Questions & Answers About CDC's Novel H1N1 Influenza Surveillance. International Human Cases of H1N1 Flu Infection See: World Health Organization.