very serious and highly contagious disease serious illness Typical symptoms of the flu http://www.cdc.gov/flu/about/disease/complications.htm flu-related complications some people will develop complications symptoms U.S. Centers for Disease Control and Prevention complications very serious and highly contagious disease What are the symptoms? U.S. Centers for Disease Control and Prevention common flu symptoms include fever or chills 4,600 people died hospitalization http://www.cdc.gov/flu/about/disease/complications.htm http://www.cdc.gov/flu/about/disease/complications.htm CDC—Flu symptoms and complications serious illness complications U.S. Centers for Disease Control and Prevention complications U.S. Centers for Disease Control and Prevention CDC—Flu symptoms and complications http://www.cdc.gov/flu/about/disease/complications.htm symptoms may linger complications complications become a victim of flu complications become a victim of flu flu symptoms symptoms http://www.cdc.gov/flu/about/disease/complications.htm influenza symptoms hoarse cough accompanied with symptoms like muscle ache complications from influenza http://www.cdc.gov/flu/about/disease/complications.htm http://www.cdc.gov/flu/about/disease/complications.htm Complications of flu fever, sore throat and chills CDC complications http://www.cdc.gov/flu/about/disease/complications.htm What are the symptoms? CDC has a helpful article Symptoms of the flu flu symptoms U.S. Centers for Disease Control and Prevention http://www.cdc.gov/flu/about/disease/complications.htm could require a hospital stay. influenza complications