About Influenza (Flu)

Microscopic view of influenza virus

The flu is caused by influenza viruses that spread easily from person-to-person. The virus infects the nose, throat, and lungs.

Anyone can get the flu. People who have pre-existing medical conditions, those who live in long-term care facilities, and children younger than 5 are at greater risk for more severe illness from the flu. However, it is important to remember that even young and healthy people can also become very sick.

The flu can be spread at any time, so it is important to take precautions year-round. For information on how to protect yourself against the flu, visit our Flu Prevention page. For more information on avian flu, visit our Avian Influenza A Virus page.

The flu is preventable. Visit our Flu Prevention page to learn how to protect yourself from the flu.

Questions about the flu? Contact us!
Phone: 608-267-9003 | Fax: 608-261-4976

Last revised October 1, 2024