Avian influenza (bird flu)
Avian influenza is primarily a disease of birds, Rarely, people may be infected after close contact with infected birds.
There are different strains of bird flu (external site) and they can be low or highly pathogenic. This refers to the ability of the virus to cause disease in birds.
What are the symptoms?
Symptoms generally appear between 2 and 10 days following exposure to the virus.
Most people will experience mild symptoms, or no symptoms at all. However, some strains can lead to severe illness in some people.
The most common symptoms are sore, irritated, red eyes, or conjunctivitis.
Avian influenza virus can also cause symptoms similar to seasonal flu, including:
- Fever
- Coughing
- Sore throat
- Difficulty breathing or shortness of breath
- Headaches
- Runny or stuffy nose
- Body aches
- Diarrhoea
How is it spread?
Avian influenza does not easily spread to people from birds. However, it can be spread to people who have had close contact with infected birds, including poultry, or their contaminated materials. Contaminated materials include feathers, faeces, or other waste from infected birds.
People infected with an avian influenza do not easily transmit the infection to others.
When person-to-person transmission has previously occurred, it was following close contact with a sick person over several days.
Eating properly cooked poultry products, such as chicken and eggs, does not result in an avian influenza infection.
Who is at risk?
People who are at risk include those who have close contact with infected birds or their contaminated materials and people who are caring for a person infected with the virus.
How to reduce your risk?
If possible, avoid contact with infected birds or people.
If you work around infected birds, you must use personal protective equipment.
A human vaccine is not available for avian influenza. Vaccination with the seasonal flu vaccine is strongly recommended for anyone aged from 6 months and over to help avoid becoming infected by both bird flu and seasonal flu at the same time.
People travelling to areas affected by avian influenza (external site) should:
- avoid poultry farms and live bird “wet” markets
- wash their hands thoroughly after handling uncooked poultry products such as meat or eggs
- ensure that poultry or poultry products are cooked thoroughly before eating.
How is it diagnosed?
Avian influenza can be diagnosed using swabs taken from the nose and throat.
How is it treated?
Anti-viral drugs used for seasonal flu are likely to work against avian influenza and are used to treat people with avian influenza virus infections.
Isolation of a person with avian influenza and the use of personal protective equipment by those caring for them helps minimise the risk of disease spread.
I have been exposed to an infected bird – what do I do?
If you believe you have been in contact with an infected bird or contaminated materials, you should self-monitor your health for ten days after the last exposure. If you develop symptoms:
- call your doctor and tell them you have been around sick animals
- stay home and away from other people as much as possible while you are unwell
- wear a mask to protect others if you cannot stay home, or you need to go out
- wash your hands often
- cover your mouth and nose when you cough or sneeze, throw away used tissues, then wash your hands.
It is important you inform medical staff that you may have been in contact with the avian influenza virus.
In a medical emergency always seek immediate health care or phone 000.
Report signs of avian influenza
Reporting signs of avian influenza (external site) is important to enable early detection and to monitor the level and locations of H5 avian influenza if it arrives in Australia.
Under WA’s Biosecurity and Agriculture Management Act 2007, any strain of avian influenza is a reportable disease and anyone who suspects the disease is present must report it (external site).
Where to get help
Last reviewed: 16-09-2025
Acknowledgements
Public Health