Flu Season in Australia: Your GP Guide to Staying Healthy This Winter

Flu Season in Australia: When It Hits and How to Prepare

Influenza — the flu — is one of the most significant preventable illnesses in Australia. Each year, flu season affects hundreds of thousands of Australians, resulting in GP visits, hospitalisations, and in severe cases, death. The good news is that an annual flu vaccination remains the single most effective way to protect yourself and the people around you.

This guide covers everything you need to know about flu season in 2026: when it starts, who should get vaccinated, who gets a free flu vaccine under Medicare, and when to see a GP if you fall ill.

When Is Flu Season in Australia?

Australia’s flu season runs from approximately May through to September, with peak activity typically occurring in June, July, and August. This is the opposite of the Northern Hemisphere, where flu peaks in winter months from November to February.

The optimal time to get vaccinated is before flu season begins — ideally between late February and the end of April. This allows your immune system approximately two weeks to build protective antibodies before the virus begins circulating in the community.

Vaccination after May is still worthwhile. If you have not yet been vaccinated and it is already June or July, do not wait — get vaccinated now. Protection takes effect within two weeks and will still cover the remainder of the season.

Who Should Get the Flu Vaccine?

The Australian Government recommends annual flu vaccination for everyone aged 6 months and over. The influenza virus mutates each year, which is why a new vaccine is formulated and released annually — last year’s vaccine may offer limited protection against this season’s strains.

Vaccination is especially important for:

• Adults aged 65 and over
• Pregnant women (at any stage of pregnancy)
• Children aged 6 months to under 5 years
• Aboriginal and Torres Strait Islander people aged 6 months and over
• People with chronic medical conditions — asthma, diabetes, heart disease, kidney disease, obesity, or immunosuppression
• Healthcare workers
• People who live with or care for high-risk individuals

Who Gets a Free Flu Vaccine Under Medicare?

Australia’s National Immunisation Program (NIP) provides free annual influenza vaccines for:

• Adults aged 65 and over — receive a high-dose or adjuvanted vaccine formulated for older immune systems
• Pregnant women — vaccination protects both mother and baby; antibodies pass through the placenta to protect newborns in the first months of life
• Children aged 6 months to under 5 years
• Aboriginal and Torres Strait Islander people aged 6 months and over
• People with chronic medical conditions who are at significantly increased risk of severe influenza complications

If you fall into one of these groups, you are entitled to a free flu vaccine at Family Doctor clinics. Bring your Medicare card and, if applicable, your Health Care Card or confirmation of your chronic condition.

If you are not in an eligible group, private flu vaccines are available at Family Doctor clinics for a modest fee. Protecting yourself also protects vulnerable people around you — particularly those who cannot be vaccinated for medical reasons.

What Does the Flu Vaccine Do — and What Doesn’t It Do?

What the flu vaccine does

• Reduces your risk of contracting influenza by 40–60% in seasons where the vaccine is a good match for circulating strains
• Significantly reduces the severity of illness if you do contract flu
• Reduces the risk of hospitalisation and death, particularly in elderly patients and those with chronic conditions
• Protects newborns when given to pregnant mothers
• Contributes to community (herd) immunity, protecting those who cannot be vaccinated

What the flu vaccine does not do

• It does not protect against the common cold or other respiratory viruses — including COVID-19 or RSV
• It does not cause influenza — the vaccine contains inactivated (killed) virus and cannot give you the flu
• It does not provide 100% protection — but vaccinated individuals who do contract flu typically experience much milder illness
• It does not last beyond one season — a new vaccine is needed each year

How Long Does the Flu Vaccine Take to Work?

After receiving the flu vaccination, your immune system takes approximately two weeks to produce a protective antibody response. This means you are not fully protected immediately after the injection — which is why vaccinating before flu season starts (before May) gives the best protection.

Side effects from the flu vaccine are typically mild and short-lived — a sore arm, mild fatigue, or a low-grade temperature for 24–48 hours. These are signs your immune system is responding, not signs of illness.

Beyond Vaccination: Preventing the Flu This Winter

• Hand hygiene — wash hands frequently with soap and water for at least 20 seconds
• Cover coughs and sneezes — use a tissue or your inner elbow, not your hands
• Avoid touching your face — particularly your eyes, nose, and mouth
• Stay home when unwell — you are most contagious in the first 3 to 4 days of illness
• Wear a mask in crowded indoor spaces if you are high-risk or symptomatic
• Ventilate indoor spaces — open windows and use good airflow
• Maintain general health — adequate sleep, regular exercise, and a balanced diet support immune function

When to See a GP for Flu Symptoms

Most healthy adults will recover from influenza at home within 7 to 10 days with rest, fluids, and over-the-counter symptom relief. However, see a GP promptly if:

• You are in a high-risk group (elderly, pregnant, chronic conditions, immunosuppressed)
• Symptoms are severe or deteriorating rather than gradually improving
• You develop chest pain, shortness of breath, or difficulty breathing
• You have a fever lasting more than 3 to 4 days
• You develop confusion, dizziness, or altered mental state
• You are unable to keep fluids down
• A child has a fever with a rash, or is unusually difficult to wake

Antiviral Medications: The 48-Hour Window

Antiviral medications such as oseltamivir (Tamiflu) can reduce the duration and severity of influenza — but they must be started within 48 hours of symptom onset to be effective. If you are in a high-risk group and have developed flu symptoms, contact your GP or a telehealth service as soon as possible. Do not wait.

Telehealth for Flu-Related Consultations

If you are unwell with flu symptoms and unable or unwilling to travel to a clinic, telehealth is an excellent option. A telehealth GP can:

• Assess your symptoms and advise on home management
• Prescribe antiviral medication if you are within the 48-hour window and clinically appropriate
• Issue a medical certificate for work or school
• Assess whether you need an in-person review or hospital assessment
• Provide advice for managing flu in children at home

Visit mygponline.com.au to book a telehealth consultation with a Family Doctor GP. Telehealth consultations are Medicare-eligible and can be bulk billed for eligible patients.

Frequently Asked Questions About the Flu Vaccine in Australia

Can I get the flu vaccine and the COVID-19 vaccine at the same time?

Yes. ATAGI confirms that flu and COVID-19 vaccines can be administered at the same visit, in different arms. There is no need to space them out.

I got the flu vaccine last year. Do I need it again?

Yes. The flu vaccine is reformulated each year to match the strains expected to circulate that season. Annual vaccination is essential.

Is the flu vaccine safe during pregnancy?

Yes, and it is strongly recommended at any stage of pregnancy. It protects both mother and baby, and antibodies cross the placenta to protect newborns before they are old enough to be vaccinated.

My child has an egg allergy. Can they still get the flu vaccine?

Current ATAGI guidance indicates that children and adults with egg allergy — including anaphylaxis to egg — can safely receive the flu vaccine in a medical setting with appropriate monitoring. Discuss this with your GP before vaccination.

How do I know if I have the flu or a cold?

Influenza typically comes on suddenly and is more severe than a common cold. Key distinguishing features include high fever (38°C or above), severe muscle aches, extreme fatigue, and headache. A cold tends to come on gradually and is primarily a nasal and throat illness. If in doubt, see your GP — rapid influenza tests are available in clinic.

Book Your Flu Vaccine at Your Nearest Family Doctor Clinic

Do not wait until flu season is in full swing. Getting vaccinated before May gives you the best protection through Australia’s winter months. Family Doctor clinics across Australia offer annual flu vaccinations — free for eligible patients under the National Immunisation Program, and available privately for everyone else.

Find your nearest Family Doctor clinic and book your flu vaccine today