Influenza is a highly contagious viral infection that affects the respiratory system, causing symptoms such as fever, cough, sore throat, chills, fatigue, and body aches. Learn how influenza spreads, who is most at risk, and the steps you can take to prevent it, including vaccination and proper hygiene practices. Explore effective treatment options, early warning signs, and tips to manage symptoms, protect loved ones, and stay healthy throughout the flu season.