This page compares COVID-19 and flu, given the best available information to date.īoth COVID-19 and flu can spread from person to person between people who are near or in close contact with one another. We are learning more everyday about COVID-19 and the virus that causes it. Additionally, some people with COVID-19 may also be affected by post-COVID conditions (also known as long COVID). People with flu and COVID-19 at the same time can have more severe disease than people with either flu or COVID-19 alone. Testing can also reveal if someone has both flu and COVID-19 at the same time, although this is uncommon. Getting treated early for COVID-19 and flu can reduce your risk of getting very sick. Having a medical professional administer a specific test that detects both flu and COVID-19 allows you to get diagnosed and treated for the specific virus you have more quickly. Specific testing is needed to tell what the illness is and to confirm a diagnosis. You cannot tell the difference between flu and COVID-19 by the symptoms alone because they have some of the same signs and symptoms. Compared to people with flu, people infected with COVID-19 may take longer to show symptoms and may be contagious for longer periods of time. More information is available about COVID-19 vaccines and how well they work.Ĭompared with flu, COVID-19 can cause more severe illness in some people. Efforts to maximize the proportion of people in the United States who are up to date with their COVID-19 vaccines remain critical to reducing the risk of severe COVID-19 illness and death. Flu is caused by infection with a flu virus ( influenza viruses ).įrom what we know, COVID-19 spreads more easily than flu. COVID-19 is caused by infection with a coronavirus (SARS-CoV-2) first identified in 2019. Influenza (flu) and COVID-19 are both contagious respiratory illnesses, but they are caused by different viruses. What is the difference between Influenza (Flu) and COVID-19?
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