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  1. Signs and Symptoms of Flu | Influenza (Flu) | CDC

  2. How to Relieve Body Aches When You’re Sick - Verywell Health

  3. Why does the flu cause body aches? - Harvard Health

  4. Why your whole body aches when you're sick (and what you can …

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

  6. Flu Stages: A Day-by-Day Guide to How Long Flu Lasts - Verywell …

  7. Flu (Influenza): Causes, Symptoms, Types & Treatment - Cleveland Clinic

  8. Symptoms of the Flu: Fever, Aching Muscles, Coughing, and More - WebMD

  9. Flu Symptoms: Headache, Sore Throat, Chills, and More - Healthline

  10. Influenza (the Flu): Signs, Symptoms, and Complications