Signs and symptoms of influenza

Clinical Signs and Symptoms of Influenza

signs and symptoms of influenza

Influenza is a viral infection that attacks your respiratory system your nose, throat and Common signs and symptoms of the flu include.

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Flu is different from a cold. People who are sick with flu often feel some or all of these symptoms:. 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. Sinus and ear infections are examples of moderate complications from flu, while pneumonia is a serious flu complication that can result from either influenza virus infection alone or from co-infection of flu virus and bacteria. Other possible serious complications triggered by flu can include inflammation of the heart myocarditis , brain encephalitis or muscle myositis, rhabdomyolysis tissues, and multi-organ failure for example, respiratory and kidney failure. Flu also can make chronic medical problems worse.

Uncomplicated influenza. Uncomplicated influenza illness is typically characterized by the abrupt onset of constitutional and upper respiratory tract signs and symptoms e.
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The flu short for influenza is a respiratory virus that affects the throat, nose, bronchi and, sometimes, the lungs. There are different types of influenza viruses and they evolve and change from year to year. For most people, the flu is an inconvenience that subsides in a few days. For others, influenza can lead to health complications, visits to the hospital and even death. Globally, 5 to 10 percent of adults and 20 to 30 percent of children get the flu each year and 3 to 5 million of these cases are severe, leading to about , to , deaths, according to the World Health Organization WHO. In the United States, there were an estimated 80, deaths and , hospitalizations from flu during the to flu season , making it the worst flu season in at least four decades, according to the Centers for Disease Control and Prevention CDC. The word "influenza" in Italian literally means "influence," a word that Italians have used for illnesses since at least the s because they, like others at the time, believed that the stars influenced health, according to the Douglas Harper Etymology Dictionary.

Influenza is a viral infection that attacks your respiratory system your nose, throat and lungs. Influenza is commonly called the flu, but it's not the same as stomach "flu" viruses that cause diarrhea and vomiting. For most people, influenza resolves on its own. But sometimes, influenza and its complications can be deadly. People at higher risk of developing flu complications include:. Though the annual influenza vaccine isn't percent effective, it's still your best defense against the flu.

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Flu (influenza)

Flu Warning Signs That Need Medical Care Right Away

All you need to know about flu

Influenza also known as the flu is a contagious viral infection that attacks your respiratory system. Influenza viruses that infect humans can be classified into three main groups: A, B, and C. Type A influenza infection can be serious and cause widespread outbreaks and disease. Common symptoms of type A infection can be confused with other conditions. While in some milder cases the flu can resolve on its own without significant symptoms, severe cases of type A influenza can be life-threatening. Unlike a common cold , the flu typically occurs with a sudden onset of symptoms.

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