Influenza, more commonly known as the “flu,” is a contagious respiratory illness caused by a virus. It can be mild or severe. Most people will have mild illness and will not need medical care and will recover in less than two weeks.
Serious outcomes of the flu can result in hospitalization or even death. Some people are more susceptible to complications of the flu, including the elderly, young children, those with compromised immune systems, and people with certain health conditions like diabetes and heart disease.