Flu Symptoms 2025 How Long Does It Last. Resources about flu symptoms, complications, diagnosis, and the differences between a cold and flu. — more evidence points to long flu being a real phenomenon, with a large study showing symptoms persist at least 4 weeks or more after some people are.
— flu symptoms typically last about one week, but may linger for some people. — in healthy children and adults, the flu typically lasts for three to seven days.