Flu in Adults (cont.)
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Prognosis of Flu in Adults
Flu symptoms start to go away after two to three days, but fever may last for about five days. Weakness and fatigue may last for a few weeks. The very young, the very old, and those in the high-risk groups are at risk for complications, including hospitalization. Some people may die from the flu.
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Influenza virus infection, one of the most common infectious diseases, is a highly contagious airborne disease that causes an acute febrile illness and results in variable degrees of systemic symptoms, ranging from mild fatigue to respiratory failure and death.