S/s:

Influenza illness can include any or all of these signs and symptoms: fever, muscle aches, headache, lack of energy, dry cough, sore throat, nasal congestion, and possibly runny nose.

 e.g., fever, myalgia, headache, malaise, nonproductive cough, sore throat, and rhinitis  

Esp. body aches and chills! Surprisingly, can also have runny nose like allergies or cold.
Also, remember that dry cough!!!!

Also ask about GI symptoms because it can also be GI flu symptoms which include nausea/vomitting/diarrhea but many people may be embarrassed to say unless you ask them.

Incubation period: The typical incubation period for influenza is 1—4 days (average: 2 days). 

Treatment: 
- usu. don't treat young children less than 2 y/o, mostly just symptom-supportive treatment.
- usu.