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How long does it take for flu symptoms to show up?

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Typical time it takes for symptoms to show up once you've caught the virus is one to four days. Adults can be contagious from the day before symptoms begin through five to 10 days after the illness starts.

SOURCE: Centers for Disease Control.

Reviewed by Carmelita Swiner on August 28, 2020

SOURCE: Centers for Disease Control.

Reviewed by Carmelita Swiner on August 28, 2020

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When is flu season in the U.S.?

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