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COVID-19, cold, allergies and the flu: What are the differences?
Similarities and Differences between Flu and COVID-19
Flu vs cold vs Covid chart: Here's how to tell the difference
How to tell if you have a cold, the flu or COVID-19
Is it a Cold, the Flu, or COVID-19? - National Institute on Aging
COVID-19 vs the Flu or Cold: Symptoms to Watch For
Is It Flu, COVID-19, Allergies, or a Cold? | NIH News in Health
COVID-19 vs. flu: Similarities and differences - Mayo Clinic