I Illness Details

Influenza (the flu) is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness, and at times can lead to death.

Fever (usually high), headache, extreme tiredness, dry cough, sore throat, runny or stuffy nose, muscle aches, nausea, vomiting, and  diarrhea. More common in children than adults.

Your respiratory illness might be the flu if you have sudden onset of body aches, high fever, and respiratory Symptoms, and your illness occurs during the usual flu season.