Flu signs and symptoms usually come on suddenly. People who are sick with flu often feel some or all of the following symptoms: fever or feeling feverish/chills, cough, sore throat, runny or stuffy nose, muscle or body aches, headaches, and fatigue/tiredness. For more information about what to do if you are experiencing any of these symptoms, visit https://www.cdc.gov/flu/symptoms/symptoms.htm | United Regional Health Care System