Flu Duration: How Long Does the Flu Last?

The length and severity of flu symptoms can vary. While the flu virus typically lasts 1-2 weeks, some symptoms, like fatigue, can persist for several weeks or even months.

The flu typically comes on suddenly and usually includes a fever, headache, sore throat, aching joints and muscles, and fatigue. In some cases, the flu can cause more severe symptoms such as pneumonia.