Similarities and sifferences between flu and COVID-19
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Up-to-Date Info: To find the latest CDC information on this topic go to: https://www.cdc.gov/coronavirus/2019-ncov/index.html

Similarities and sifferences between flu and COVID-19

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    • Corporate Authors:
      National Center for Immunization and Respiratory Diseases (U.S.). Division of Viral Diseases.
    • Description:
      What is the difference between Influenza (Flu) and COVID-19?

      Influenza (Flu) and COVID-19 are both contagious respiratory illnesses, but they are caused by different viruses. COVID-19 is caused by infection with a new coronavirus (called SARS-CoV-2) and flu is caused by infection with influenza viruses. Because some of the symptoms of flu and COVID-19 are similar, it may be hard to tell the difference between them based on symptoms alone, and testing may be needed to help confirm a diagnosis. Flu and COVID-19 share many characteristics, but there are some key differences between the two.

      While more is learned every day, there is still a lot that is unknown about COVID-19 and the virus that causes it. This page compares COVID-19 and flu, given the best available information to date.

    • Content Notes:
      Signs and Symptoms -- How long symptoms appear after exposure and infection -- How long someone can spread the virus -- How it Spreads -- People at High-Risk for Severe Illness -- Complications -- Approved Treatments -- Vaccine.
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