The flu is characterized by symptoms such as fever, cough, sore throat, runny or stuffy nose, body aches, fatigue, and headaches. It can be spread through droplets when an infected person coughs, sneezes, or talks. The best way to prevent the flu is to get vaccinated annually. Treatment options include rest, fluids, and over-the-counter medications to relieve symptoms. In severe cases, antiviral medications may be prescribed.