What Are The Risks Of The Influenza The Influenza Virus? The flu is a highly contagious respiratory disease that affects millions each year. The virus that causes flu, known as influenza, can cause mild or serious symptoms such as fever, sore mouth and fatigue as well as pain in the body. Although many recover from the flu within a few days to two weeks, it is hazardous for a few groups, including children in the early years or older people pregnant women, individuals with weakened immune systems. Flu can cause serious problems, like the occurrence of pneumonia, and even hospitalization. In certain cases, it can even lead to the death of. To avoid spreading that can be fatal, get vaccinated and wash your hands frequently. https://preventchildhoodinfluenza.org/