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Influenza (flu) - Symptoms and causes - Mayo Clinic Symptoms of the flu such as a sore throat and a runny or stuffy nose are common You may also get these symptoms with other illness such as a cold But colds tend to start slowly, and the flu tends to come on quickly, within two or three days after you come in contact with the virus
What Are the First Signs of Flu? - Verywell Health The flu virus incubates for one to two days, and symptoms typically appear quickly, often within a few hours You might wake up feeling fine but worsen throughout the day or wake up with full symptoms like body aches, headaches, and fever after feeling okay the night before
Flu (Influenza): Causes, Symptoms, Types Treatment What is the flu (influenza)? The flu is an illness you get from the influenza virus It causes symptoms like head and body aches, sore throat, fever and respiratory symptoms, which can be severe Flu is most common in winter months, when many people can get sick at once (an epidemic)
Common Symptoms of the Flu: Early Signs, Stages 2026 Guide Common signs include chills, a dry cough, a sore throat, and a headache While most healthy adults recover within a week, certain groups are at high risk for complications like pneumonia Early recognition—ideally within the first 48 hours—is critical for the effectiveness of antiviral treatments
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