Influenza

Influenza, commonly known as the flu, is a viral infection that mainly affects the nose, throat, and sometimes the lungs. It spreads from person to person through droplets released when an infected person coughs, sneezes, or talks. You can also catch the flu by touching contaminated surfaces and then touching your eyes, nose, or mouth.  

Unlike the common cold, influenza usually develops suddenly and can cause more severe symptoms. While most people recover within 5–7 days, some may develop serious complications, particularly those at higher risk, such as children, elderly people, pregnant women, and people with asthma, diabetes, heart, or kidney disease.