The signs and symptoms of flu caused by the H1N1 virus are similar to those of infections caused by other flu strains and can include: 
Fever, but not always
Chills
Cough
Sore throat
Runny or stuffy nose
Watery, red eyes
Body aches
Headache
Fatigue
Diarrhea
Nausea and vomiting
 Flu symptoms develop about one to three days after you're exposed to the virus.