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  1. Common cold - Symptoms and causes - Mayo Clinic

  2. Common Cold: Symptoms, How to Treat, and More - Healthline

  3. Common Cold: Symptoms, Cold vs. Flu, Treatment - Cleveland Clinic

  4. Cold Versus Flu | CDC

  5. Common cold - Wikipedia

  6. Common cold - Diagnosis and treatment - Mayo Clinic

  7. Common Cold: Symptoms, Treatment, and Recovery - Verywell …

  8. Common Cold | Johns Hopkins Medicine

  9. Cold and Flu (Influenza) Center: Symptoms, Treatments, Causes, …

  10. COVID-19, cold, allergies and the flu: What are the differences?