1. Influenza (flu) - Symptoms and causes - Mayo Clinic

  2. Flu (Influenza): Causes, Symptoms, Types & Treatment

    Oct 11, 2022 · What is the flu (influenza)? The flu is an illness you get from the influenza virus. It causes symptoms like head and body aches, sore throat, fever and respiratory symptoms, which can be severe. Flu is most common in winter …

  3. Do I Have The Flu? Flu Symptoms, Treatments, and Prevention.

  4. Influenza (Flu) | Influenza (Flu) | CDC - Centers for …

    Influenza (flu) is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and lungs. Learn about flu, including symptoms, prevention methods, and treatment options.

  5. Influenza - Wikipedia