Flu Activity & Surveillance

Weekly U.S. Influenza Surveillance Report (FluView)

Fluview a weekly influlenza surveillance report prepared by the influenza division

A weekly influenza surveillance report prepared by the Influenza Division. All data are preliminary and may change as more reports are received.

FluView Interactive

Influenza surveillance data the way you want it. This series of dynamic visualizations allow any Internet user to access influenza information collected by CDC’s monitoring systems.

State Activity Indicator Map

Data collected in ILINet are used to produce a measure of ILI(influenza like illness) activity* by state. Activity levels are based on the percent of outpatient visits in a state due to ILI.

Current United States Flu Activity Map

The influenza activity reported by state and territorial epidemiologists indicates geographic spread of influenza viruses, but does not measure the severity of influenza activity.

Additional Information

Overview of Influenza Surveillance in the United States

CDC’s World Health Organization (WHO) Collaborating Center for Surveillance, Epidemiology and Control of Influenza

Past Weekly Surveillance Reports

Antigenic Characterization

Influenza Virus Genome Sequencing and Genetic Characterization

Advanced Molecular Detection (AMD) and Influenza

International Influenza Surveillance

Annual Burden of Influenza

Flu Burden Averted from Vaccination

In-Season Burden Estimates

FluSight Forecasting