As we approach peak influenza (flu) season, be armed with the information to keep yourself and your loved ones safe. Flu is a respiratory disease caused by a virus that attacks the nose, throat and lungs. Most cases of the flu are mild or moderate, not requiring hospitalization. However, at times flu can be severe, even leading to death. It is not the same as “stomach flu.”Flu symptoms include fever, dry cough, sore throat, headache, extreme tiredness, and body aches.