Flu Activity & Surveillance
A weekly influenza surveillance report prepared by the Influenza Division. All data are preliminary and may change as more reports are received.
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.
The influenza activity reported by state and territorial epidemiologists indicates geographic spread of influenza viruses, but does not measure the severity of influenza activity.