when does pneumonia occur after flu?
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With influenza pneumonia, for example, someone may become sick as soon as 12 hours or as long as 3 days after exposure to the flu virus. But with walking pneumonia, a person may not feel it until 2 to 3 weeks after becoming infected.
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Most cases of pneumonia will cause chest pain, especially what doctors call "pleuritic chest pain," or painful breathing. Beyond that, the symptoms depend only somewhat on the underlying cause. About half of all cases of pneumonia are caused by viruses, including flu viruses.
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Flu is usually most infectious from the day your symptoms start and for a further 3 to 7 days. Children and people with lowered immune systems may be infectious for a few days longer.
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Often, pneumonia begins after an upper respiratory tract infection (an infection of the nose and throat), with symptoms starting after 2 or 3 days of a cold or sore throat. It then moves to the lungs.
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Interstitial pneumonia is a rare complication of the influenza vaccine and was first described in association with this vaccine in 1998 (6). Our search identified 9 cases (5 men and 4 women; mean age, 62.2 years; age range, 38-75 years) of influenza vaccine-induced interstitial pneumonia, including the present 2.
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Symptoms due to viral URI typically last 2–14 days, but some symptoms can linger for several weeks (most people recover in about 7–10 days). Productive cough or discolored nasal discharge does not necessarily require antibiotic therapy. Influenza (flu) is a viral infection caused by the influenza virus.
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Get Vaccinated The flu is a common cause of pneumonia, so preventing the flu is a good way to prevent pneumonia. Children younger than 5 and adults 65 and older should get vaccinated against pneumococcal pneumonia, a common form of bacterial pneumonia.
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The symptoms of pneumonia can develop suddenly over 24 to 48 hours, or they may come on more slowly over several days. Common symptoms of pneumonia include: a cough – which may be dry, or produce thick yellow, green, brown or blood-stained mucus (phlegm)
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Pneumonia is an inflammation of the airways caused by a bacterial, viral, or fungal infection. Walking pneumonia is a nonmedical term for a milder case of pneumonia. The medical term for this condition is atypical pneumonia. When you have pneumonia, you'll likely need to spend at least a few days on bed rest.
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Pneumonia is a lung infection caused by bacteria, viruses, or fungi. Some of these germs do spread from person to person, so you may be contagious if you have certain types of pneumonia. However, not everyone will develop pneumonia when exposed to the same germs.
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It can occur in one or both lungs. Symptoms of pneumonia vary in severity, but people may experience chest, abdominal, or back pain when breathing or coughing. Other symptoms of pneumonia can include: fever and chills.
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Flu Complications Most people who get flu will recover in a few days to less than two weeks, but some people will develop complications (such as pneumonia) as a result of flu, some of which can be life-threatening and result in death.
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It tends to be more serious than other types. When a virus causes your pneumonia, you're more likely to notice symptoms over several days. Early signs will look like the flu -- such as fever, dry cough, headache, and weakness -- but get worse in a day or two.
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It may take time to recover from pneumonia. Some people feel better and are able to return to their normal routines within a week. For other people, it can take a month or more. Most people continue to feel tired for about a month.
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Most cases of pneumonia follow a viral upper respiratory tract infection. Typically, the viruses that cause these infections (respiratory syncytial virus, influenza, parainfluenza, adenovirus) spread to the chest and produce pneumonia there. Pneumonia also can be caused by bacterial infections.
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Flu symptoms you should not ignore. Most cases of the flu are a nuisance – you'll be on your back for a few days or weeks, and then you can return to your normal routine. But certain flu symptoms, like sudden dizziness, may signal a more serious medical problem, like sepsis or pneumonia.