The flu, short for influenza, is a contageous virus that is most often passed around during the winter season. Symptoms can include fever, fatigue, congestion or runny nose, cough, body aches, headache, sore throat and lack of appetite, and usually go away in about two weeks.
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People sometimes confuse the flu with the common cold. However, flu symptoms are usually more severe than cold symptoms. Unlike a cold, the flu tends to develop rapidly.
Signs and symptoms of the flu include: