Influenza meaning

Influenza, commonly known as the flu, is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness, and at times can lead to death. Symptoms typically include fever, cough, sore throat, body aches, headaches, and fatigue. Annual vaccination is the most effective way to prevent the flu, along with good hygiene practices such as handwashing and avoiding close contact with infected individuals.