['Being very tired or sleepy (also called fatigue)', 'Cough.', 'Fever (100 F or above), chills or body shakes. Not everyone who has the flu has a fever.', 'Headache, or muscle or body aches.', 'Runny or stuffy nose.', 'Sore throat.', 'Vomiting (throwing up) or diarrhea.']