FluPrevention

How Long Are You Contagious with the Flu?

Understanding the Flu and Its Contagious Period Influenza, or the flu, is a contagious respiratory illness caused by the influenza virus. It can cause mild to severe illness and, in some cases, can lead to complications such as pneumonia, bronchitis, and sinus or ear infections. The flu virus spreads from person to person through respiratory droplets when an infected person…