You cannot tell the difference between flu and COVID-19 by symptoms alone because some of the symptoms are the same. Some tests can differentiate between flu and COVID-19 at the same time. If one of these tests is not available, many testing locations (https://www.hhs.gov/coronavirus/community-based-testing-sites/index.html) provide flu and COVID-19 tests separately. Talk to a healthcare provider about getting tested for both flu and COVID-19 if you have symptoms. Learn more: https://www.cdc.gov/flu/symptoms/flu-vs-covid19.htm