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Common cold - Symptoms and causes - Mayo Clinic
Common Cold: Symptoms, How to Treat, and More - Healthline
Common cold - Diagnosis and treatment - Mayo Clinic
Common cold - Wikipedia
Common Cold | Johns Hopkins Medicine
Common Cold: Symptoms, Cold vs. Flu, Treatment - Cleveland Clinic
Common Cold - Infections - Merck Manual Consumer Version
Quick Facts:Common Cold - Merck Manual Consumer Version
Understanding the Common Cold -- the Basics - WebMD
Common Cold - Infectious Diseases - Merck Manual Professional …