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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.

Influenza Surveillance in the United States

February 24, 2010 3:30 PM ET

Overview of Influenza Surveillance in the U.S.

An overview of five existing categories of influenza surveillance

FluView

A Weekly Influenza Surveillance Report Prepared by the Influenza Division.

AHDRA (Aggregate Hospitalization and Deaths Reporting Activity)

A Supplemental Influenza Surveillance System for Hospitalizations and Deaths during the 2009 H1N1 pandemic.

BRFSS 2009 H1N1 Flu Modules for Influenza-like Illness (ILI) and Vaccination

 

 
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