Influenza (flu) is a contagious respiratory illness

People with flu can spread it to others up to about 6 feet away.

The Flu Is Contagious

The influenza A and B viruses that routinely spread in people (human influenza viruses) are responsible for seasonal flu epidemics each year.

Influenza is a highly contagious illness caused by a group of viruses called the orthomyxoviruses.

Influenza is a highly contagious illness caused by a group of viruses called the orthomyxoviruses.

Although an influenza vaccine is available, it does not offer complete protection against the disease. The vaccine has been shown only to limit the complications that may occur due to influenza.