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Flu Stages: A Day-by-Day Guide to How Long Flu Lasts - Verywell …
Signs and Symptoms of Flu | Influenza (Flu) | CDC
Cold Versus Flu | Influenza (Flu) | CDC - Centers for Disease …
Is it a cold or flu? | Flu Resource Center | CDC - Centers for …
Influenza (flu) - Symptoms and causes - Mayo Clinic
Cold and Flu Symptoms - WebMD
Is it a Cold, the Flu, or COVID-19? | National Institute on Aging
Flu or Cold? Know the Differences - WebMD
Cold vs. flu symptoms | HealthPartners Blog