The flu is an illness caused by the influenza viruses. Flu gets passed around every year, with some years being worse than others. While people may think about flu in the colder months, it can also spread in the summer.
This page has more general information on the flu, including information on signs and symptoms and resources.
This page has tips on ways to prevent the flu.
This page has information on influenza data and the Weekly Respiratory Report.
This page is for local health departments, health care providers, or those looking for information on reporting, surveillance, or diagnosis of the flu.
This page is for local health departments, health care providers, or those looking for resources for the flu education, outreach, vaccination logistics and quality improvement.
Questions about the flu? Talk to your doctor.
Or find answers to frequently asked questions and learn more about the flu with the Centers for Disease Control.