how long can the tiredness from the flu last
Influenza (the flu) Fever Rare Usual, sudden onset 39Âº-40ÂºC (102.2-104ÂºF), lasts up to 3 to 4 days Headache Rare Usual, can be severe Aches and pains Sometimes mild Usual, often severe Fatigue and weakness Sometimes mild Usual, may last 2-3 weeks or more Extreme fatigue Unusual