You may be able to pass on the virus, even if you don't feel sick yet. Medically reviewed by Kashif J. Piracha, MD The flu incubation period is the time from when you come into contact with the flu ...

Influenza, commonly called the flu, is a respiratory infection caused by the influenza virus. It is contagious, which means it passes easily from one person to another. Although influenza viruses can ...

Influenza, which is more commonly known as the flu, is a highly contagious respiratory illness caused by viruses. There are three types of influenza viruses that make people sick: A, B and C.