Health professionals can diagnose influenza (flu) using your symptoms alone if many cases of a similar illness have occurred in the community and if the local health department has confirmed a flu outbreak.
Influenza (flu) usually comes on suddenly. In many cases you can pinpoint the hour when symptoms started. Symptoms develop 1 to 4 days after you are infected. Classic flu involves fever for about 3 days, followed by a gradual decrease in other symptoms.
In most healthy people, influenza will go away in 7 to 10 days. The worst symptoms usually last 3 to 4 days. Home treatment to ease symptoms and prevent complications is usually all that is needed. Antiviral medications can be taken to: Reduce the severit
Anyone exposed to an influenza (flu) virus can become infected. These viruses are contagious and spread easily among people in groups, such as in nursing homes, hospitals, shelters, schools, and day cares.