Influenza (commonly known as the flu), is an infection of the nose, throat and sometimes lungs caused by flu viruses.

It spreads very easily and quickly between people through coughing, talking, sneezing and contact with contaminated hands, tissues and other infected items.

The flu can cause serious illness and complications for anyone, but some groups of people are at even higher risk of serious flu infection, complications and hospitalisation.

2021 Flu vaccines

Some groups of people are more likely to be seriously affected by the flu. FREE flu vaccines are available to people in at-risk groups. 

Information for health professionals

Resources and information is available for health professionals to help structure and manage the 2021 Influenza Program.

Flu (seasonal)

Learn more about symptoms, treatment and prevention of the flu.