how long are you contagious after a cold virus?
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The common cold is infectious from a few days before your symptoms appear until all of the symptoms are gone. Most people will be infectious for around 2 weeks. Symptoms are usually worse during the first 2 to 3 days, and this is when you're most likely to spread the virus.
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How Long Is It Contagious? If a virus is to blame, you may have been contagious days before you got the sinus infection. Most viruses can be spread for just a few days, but sometimes you could pass it on for a week or more.
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About a week. 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.
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How long are people infectious? People infected with a norovirus are contagious from the moment they begin feeling ill to at least three days after recovery. Some people may be contagious for as long as two weeks after recovery.
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People infected with RSV are usually contagious for 3 to 8 days. However, some infants, and people with weakened immune systems, can continue to spread the virus even after they stop showing symptoms, for as long as 4 weeks.
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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.”
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For most flu viruses, that window is about a week, starting from a day before your symptoms appear, to six or seven days afterward. For colds, even people who are feeling better can spread the virus to others for up to three weeks.
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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). Colds are considered upper respiratory infections.
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Most people will be infectious for around 2 weeks. Symptoms are usually worse during the first 2 to 3 days, and this is when you're most likely to spread the virus.
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You're contagious from about 6 days after the start of cold-like symptoms to 3 weeks after the coughing starts. If you start antibiotics within 3 weeks of starting to cough, it will reduce the time you're contagious for.
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Pittman notes individuals with the flu can be contagious for up to three weeks after the onset of symptoms. “In many cases, just because you or your children are fever free and can return to work or school does not mean you are no longer contagious.
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People with the virus are likely contagious from the day or so before symptoms first appear until about five days after symptoms begin. Children and people with weakened immune systems may be contagious for a slightly longer time.
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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.
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After an incubation period of 24 to 72 hours, cold symptoms begin with a scratchy or sore throat, followed by sneezing, rhinorrhea, nasal obstruction, and malaise. Temperature is usually normal, particularly when the pathogen is a rhinovirus or coronavirus.
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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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People are definitely contagious while they have symptoms, which can last 2–4 weeks or even longer. Health experts aren't sure how long people with mono stay contagious after symptoms are gone, but it seems they can spread the infection for months after that.
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If you catch the flu, you're contagious for one to two days before you start to show symptoms and for five to seven days after becoming sick.