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  1. Is It Flu, COVID-19, Allergies, or a Cold? | NIH News in Health

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

  3. Is it a cold, flu, RSV or COVID-19? Here’s how to tell the difference

  4. RSV, Covid, flu symptoms: How to distinguish the differences - NBC News

  5. Respiratory illnesses on the rise with symptoms similar to COVID-19

  6. Is it allergies or COVID-19? Symptoms can be similar

  7. COVID or allergies? Omicron symptoms make it hard to tell

  8. Is It COVID, or Is It Allergies? | Scientific American

  9. Is it COVID, flu, or allergies? How to protect yourself and loved …

  10. Differences Between RSV, the Flu and Covid-19 - Cleveland Clinic …