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   How long is a person contagious with the flu?

   • Flu viruses can be detected in most infected persons beginning one day before symptoms develop and up to five to seven days after becoming sick. People with flu are most contagious during the first 3 days of their illness. Some people, including young children and people with weakened immune systems may be contagious for longer periods of time.

   How Flu Spreads | CDC - Centers for Disease Control and Prevention

   www.cdc.gov/flu/about/disease/spread.htm

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   Is influenza A contagious illness?

   • Influenza (also known as “flu”) is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness, and at times can lead to death. This page provides resources about flu symptoms, complications, and diagnosis. Flu viruses can cause mild to severe illness. Learn common symptoms and complications.

   Flu Symptoms & Diagnosis | CDC

   www.cdc.gov/flu/symptoms/index.html

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   Can a person spread a flu virus before symptoms start?

   • It is theoretically possible that before symptoms begin, an infected person can spread flu viruses to their close contacts. Some people can be infected with flu viruses and have no symptoms but may still be able to spread the virus to their close contacts.

   How Flu Spreads | CDC - Centers for Disease Control and Prevention

   www.cdc.gov/flu/about/disease/spread.htm

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2. health.clevelandclinic.org › how-long-is-the-fluHow Long Are You Contagious With the Flu?

   health.clevelandclinic.org › how-long-is-the-flu

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   You can be contagious with the flu a day before your symptoms begin. You’re most contagious in the first three to four days after you feel sick.

3. www.mayoclinic.org › diseases-conditions › fluInfluenza (flu) - Symptoms and causes - Mayo Clinic

   www.mayoclinic.org › diseases-conditions › flu

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   Jan 10, 2024 · People with the virus are likely contagious from about a day before symptoms appear until about 5 to 7 days after they start. Children and people with weakened immune systems may be contagious for a slightly longer time.

4. www.cdc.gov › flu › aboutKey Facts About Influenza (Flu) | CDC - Centers for Disease ...

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   Mar 22, 2024 · runny or stuffy nose. muscle or body aches. headaches. fatigue (tiredness) some people may have vomiting and diarrhea, though this is more common in children than adults. *It’s important to note that not everyone with flu will have a fever. More information is available at Flu and COVID-19 symptoms. How Flu Spreads.

5. www.webmd.com › cold-and-flu › how-long-flu-contagiousThe Flu: How Long Are You Contagious? - WebMD

   www.webmd.com › cold-and-flu › how-long-flu-contagious

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   Dec 11, 2022 · 2 min read. Doctors tell you to stay home when you have the flu so you don’t get other people sick. But how long do you have to shut yourself away? Here’s how to know when you can be out and...

6. www.cdc.gov › flu › symptomsFlu Symptoms & Diagnosis | CDC

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   Influenza (also known as “flu”) is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness, and at times can lead to death. This page provides resources about flu symptoms, complications, and diagnosis. Flu Symptoms & Complications. Flu viruses can cause mild to severe illness.

7. www.cdc.gov › flu › aboutHow Flu Spreads | CDC - Centers for Disease Control and ...

   www.cdc.gov › flu › about

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   Mar 22, 2024 · When Are People with Flu Contagious? Flu viruses can be detected in most infected persons beginning one day before symptoms develop and up to five to seven days after becoming sick. People with flu are most contagious during the first 3 days of their illness.