Flu vs. COVID-19 vs. RSV: How to Tell Which Respiratory Illness You May Have

Flu, COVID-19, and RSV can look similar at first. Learn how their symptoms compare, when testing may be useful, and when respiratory illness may require medical attention.

Flu, COVID-19, and RSV can look similar at first. Learn how their symptoms compare, when testing may be useful, and when respiratory illness may require medical attention.