FluVaccine

Health

When Are You Most Contagious with the Flu?

Understanding Flu Transmission The flu is a contagious respiratory illness caused by influenza viruses. It spreads through respiratory droplets when an infected person talks, coughs, or sneezes. These droplets can land in the mouths or noses of people nearby, and inhaled into their lungs, causing them to get sick. Flu viruses can also spread by touching a surface or object…