Flu symptoms can be mild or severe, and can come on suddenly - be sure you know your flu treatment options so you can be prepared. Symptoms generally appear 1 to 4 days after exposure to the virus.
The common symptoms of the flu include:
- Fever (100º F or greater)
- Muscle aches
- Extreme tiredness
- Runny nose (more common in children than adults)
If you have one or more of these symptoms, it could be the flu.