how do you know when you are not contagious with flu?
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Typically, you're contagious from 1 day before you have any symptoms. You stay that way for 5 to 7 days after you start feeling sick. The virus can be spread until symptoms disappear.
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When Flu Spreads Symptoms can begin about 2 days (but can range from 1 to 4 days) after the virus enters the body. That means that you may be able to pass on the flu to someone else before you know you are sick, as well as while you are sick. Some people can be infected with the flu virus but have no symptoms.
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Flu Symptoms. You typically start to feel bad quickly instead of over time. You may have a high fever, headache and muscle aches, cough, sore throat, and tiredness. You also might have a runny or stuffy nose, chills, headache, and nausea or vomiting.
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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. From: What Are Your Odds of Getting the Flu? SOURCE: Centers for Disease Control.
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Influenza (flu) is a very contagious viral infection of the respiratory system. It causes a high fever, body aches, a cough, and other symptoms. Most children are ill with the flu for less than a week. But some children have a more serious illness and may need to be treated in the hospital.
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When Flu Spreads People with flu are most contagious in the first three to four days after their illness begins. Most healthy adults may be able to infect others beginning 1 day before symptoms develop and up to 5 to 7 days after becoming sick.
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For colds, most individuals become contagious about a day before cold symptoms develop and remain contagious for about five to seven days. Some children may pass the flu viruses for longer than seven days (occasionally for two weeks).
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Early signs of the flu include: fatigue. sudden fever (usually above 100°F [38°C]) scratchy or sore throat.
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The flu is an extremely contagious upper respiratory illness caused by influenza A and B viruses. Symptoms include a fever, runny nose, chills, fatigue, and body aches. In severe cases, the flu can lead to viral or bacterial pneumonia or sepsis, which is a life-threatening complication of an infection.
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When Flu Spreads Symptoms can begin about 2 days (but can range from 1 to 4 days) after the virus enters the body. That means that you may be able to pass on the flu to someone else before you know you are sick, as well as while you are sick.
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['Being very tired or sleepy (also called fatigue)', 'Cough.', 'Fever (100 F or above), chills or body shakes. Not everyone who has the flu has a fever.', 'Headache, or muscle or body aches.', 'Runny or stuffy nose.', 'Sore throat.', 'Vomiting (throwing up) or diarrhea.']
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Diagnosis. Your doctor will conduct a physical exam, look for signs and symptoms of influenza, and possibly order a test that detects influenza viruses. During times when influenza is widespread, you may not need to be tested for influenza. Your doctor may diagnose you based on your signs and symptoms.
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Does no fever mean not contagious? Unfortunately, fever & contagiousness are unrelated. Some contagious illnesses - such as the common cold - may never cause a fever, while others will take a while for a fever to show up. Viruses, with or without a fever, tend to be contagious.
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Flu usually comes on suddenly. People who have flu often feel some or all of these symptoms: fever* or feeling feverish/chills. cough.
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Blood Tests A blood test for influenza is usually not performed if an individual presents with flu symptoms in an area that is known to have a flu outbreak.
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An infected person can spread the flu for five to seven days after becoming infected. The infectious period can begin 24 hours before the onset of symptoms. This means you can spread the flu without even knowing you're sick.
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“Most people are contagious with a cold a day before they notice symptoms until about a week after the onset of symptoms,” Pittman said. “The CDC's recommendation is to stay home until you are fever free for 24 hours without the help of a fever reducer.”