What Are the Stages of Flu Symptoms? Topic Guide

What Are the Stages of Flu Symptoms? What Are the Stages of Flu Symptoms?: Symptoms of the flu usually come on suddenly and can last several weeks. Flu symptoms tend to occur in three stages and include a sudden appearance of symptoms Days 1 through 3 (fever, chills, muscle or body aches, weakness, sore throat, cough, headache, stuffy nose, vomiting and diarrhea [more common in children]); cough, some mild chest discomfort, and hoarse, dry, or sore throat, fatigue, fever and muscle aches decrease by Day 4; and symptoms decrease by Day 8 (cough and tiredness may persist for one to two weeks or longer).

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