What are the symptoms of the flu?

Symptoms may appear 1 to 4 days after being exposed to the virus. The most common symptoms of the flu include:

• Fever or feeling feverish/chills (not everyone with the flu will have a fever)
• Cough
• Sore throat
• Runny or stuffy nose
• Muscle or body aches
• Headaches
• Fatigue (tiredness)
• Vomiting and diarrhea (more common in children than adults)

Cases of the flu range from mild to severe. Some people are at higher risk of developing serious flu-related complications if they get sick. Visit the CDC website for more information about symptoms.