Sudden fever or feeling feverish
Chills
Cough
Sore throat
Runny or stuffy nose
Muscle or body aches
Headache
Fatigue or weakness
Symptoms that start quickly
Nausea, vomiting, or diarrhea, especially in children
Recent close contact with someone who has flu
Symptoms that are worse than a common cold
Positive flu test from a healthcare provider