CDC

The Centers for Disease Control and Prevention (CDC) is a U.S. government public health organization that provides information and guidance to help people understand and respond to influenza. Its flu resources explain how the virus spreads, common signs and symptoms, possible complications, and which people may be at higher risk of serious illness. The site also offers practical prevention information, including seasonal flu vaccination guidance and strategies to reduce the risk of infection.

For people who become sick, the CDC explains how flu is diagnosed and discusses antiviral medications as a possible treatment option. Its resources serve several audiences: the general public, health care providers, and public health laboratories. Professional materials cover clinical guidance, vaccine recommendations and product information, testing, infection control, and influenza viruses. The CDC also publishes U.S. flu surveillance reports, estimated seasonal disease burden, and vaccination data through resources such as FluVaxView. Related information addresses avian and swine flu, influenza in animals, pandemic flu, and comparisons between flu and COVID-19.