Oct 22, 2025 · Flu, also called influenza, is an infection of the nose, throat and lungs, which are part of the respiratory system. The flu is caused by a virus. Influenza viruses are different from the "stomach …

As early as 1504, influenza began to mean a 'visitation' or 'outbreak' of any disease affecting many people in a single place at once. During an outbreak of influenza in 1743 that started in Italy and …

Nov 29, 2025 · What is influenza? Influenza is an acute viral infection of the upper or lower respiratory tract marked by fever, chills, and a generalized feeling of weakness and pain in the muscles together …

Oct 11, 2022 · What is the flu (influenza)? The flu is an illness you get from the influenza virus. It causes symptoms like head and body aches, sore throat, fever and respiratory symptoms, which can be …

Feb 28, 2025 · Seasonal influenza (the flu) is an acute respiratory infection caused by influenza viruses. It is common in all parts of the world. Most people recover without treatment. Influenza spreads …

Influenza (flu) is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and lungs. Learn about flu, including symptoms, prevention methods, and treatment options.

Flu is a shortened form of influenza.

Influenza (flu) is a viral infection of the lungs and airways with one of the influenza viruses. It causes a fever, runny nose, sore throat, cough, headache, muscle aches (myalgias), and a general feeling of …

Viruses are generally passed from person to person through the air when an infected person sneezes or coughs. But the virus can also live for a short time on objects like doorknobs, pens, pencils, …

Oct 27, 2025 · The flu is a respiratory infection caused by flu viruses. The viruses pass through the air and enter your body through your nose or mouth. It can also be acquired from contaminated …