A bad flu season can mean more than a few days away from work or school. Influenza can cause serious illness, worsen existing medical conditions and spread quickly through households. Understanding flu vaccine eligibility helps you make a timely decision for yourself and the people you care for.
In Australia, annual flu vaccination is recommended for everyone aged six months and over, unless there is a medical reason not to have it. Some people are also eligible for a free vaccine through the National Immunisation Program, while others may need to pay a private fee. Your GP can confirm the most suitable option for your age, health history and circumstances.
Flu vaccine eligibility in Australia
The influenza virus changes over time, which is why the flu vaccine is updated and given each year. Having last year’s vaccine does not provide the best protection for the current season.
While most people can be vaccinated, the Australian Government funds free flu vaccines for groups more likely to become seriously unwell from influenza or to experience complications. Eligibility can vary if state-based programs are offered during a particular flu season, so it is sensible to check before booking.
People commonly eligible for a free flu vaccine
Under the National Immunisation Program, free annual influenza vaccination is generally available for children aged six months to under five years, Aboriginal and Torres Strait Islander people aged six months and over, pregnant women, and people aged 65 years and over.
It is also generally funded for people aged six months and over with certain medical conditions that increase their risk of influenza complications. These include chronic heart, lung, kidney, liver or neurological conditions, diabetes and other metabolic disorders, weakened immunity, and some long-term conditions that affect breathing or swallowing. The exact eligibility criteria matter, so speak with your GP if you are unsure whether a diagnosis, treatment or medication places you in an eligible group.
Some people working in higher-risk environments, such as residential aged care or disability care, may have workplace vaccination requirements. These requirements are separate from whether the vaccine is funded, but they are another good reason to arrange vaccination early in the season.
Why pregnancy changes flu vaccine eligibility
Pregnancy increases the risk of severe influenza, particularly later in pregnancy. The flu vaccine is recommended during every pregnancy and can be given at any stage. It protects the mother during pregnancy and also helps protect the baby in the first months of life, before they are old enough to be vaccinated themselves.
There is no need to wait for a particular trimester. If you are pregnant during flu season, or will be pregnant soon, booking at a convenient time is usually the practical choice. Your GP or nurse can answer questions about receiving the flu vaccine alongside other recommended pregnancy vaccines.
Children, teenagers and family vaccination
Children under five are eligible for a free flu vaccine because young children can become quite unwell from influenza, even if they have no known health condition. Children receiving an influenza vaccine for the first time and who are aged under nine may need two doses, given at least four weeks apart. Your clinician will confirm whether this applies to your child.
For older children and teenagers, the vaccine is still recommended annually. It may be privately funded unless they are Aboriginal or Torres Strait Islander, have an eligible medical condition, or are covered by a local program. Vaccination can also help reduce the chance of flu moving through a family, particularly where there is a baby, grandparent, pregnant person or someone with chronic illness at home.
For families, it can be easier to organise vaccinations together. A general practice can also review each family member’s immunisation history, health conditions and any concerns about needles or previous reactions.
Adults aged 65 years and over
People aged 65 years and over are eligible for a free flu vaccine and are usually offered a vaccine specifically designed to produce a stronger immune response in older adults. As immunity can become less effective with age, annual vaccination is particularly valuable for helping reduce the risk of serious illness, hospitalisation and complications such as pneumonia.
If you are caring for an older relative, encourage them not to delay vaccination until influenza is widespread. It is also worth considering vaccination for household members and regular carers, as this can provide an added layer of protection around someone who is more vulnerable.
When should you get the flu vaccine?
In Victoria, influenza generally becomes more common through the cooler months, although outbreaks can occur outside the usual season. It takes around two weeks after vaccination for the body to develop its best immune response. For most people, vaccination is best arranged before flu activity rises, often from April onwards.
That said, it is still worthwhile to be vaccinated later in the season if you have missed the earlier window. Flu can continue circulating for months, and some protection is better than remaining unvaccinated. If you are travelling overseas, working with vulnerable people or have a condition that increases your risk, your GP may recommend arranging it promptly.
You may be able to receive the flu vaccine at the same appointment as other vaccines. The right approach depends on your age, vaccination schedule and personal circumstances, so ask your clinician if you are due for more than one immunisation.
Who may need to wait or seek medical advice?
Most people can safely receive an influenza vaccine, including people with egg allergy. Current influenza vaccines are not usually withheld because of egg allergy, though your GP can advise if you have had a severe allergic reaction to a vaccine or one of its ingredients in the past.
You may be advised to postpone vaccination if you have a significant acute illness or fever. A mild cold without fever is not always a reason to delay, but it is still helpful to mention how you are feeling when you attend.
Talk with a GP before vaccination if you have previously experienced Guillain-Barre syndrome, had a serious reaction after a flu vaccine, have a complex immune condition, or are receiving treatments that affect your immune system. These circumstances do not automatically mean you cannot be vaccinated. They simply call for individual clinical advice.
What to expect after your vaccination
The most common side effects are mild and short-lived. You may have a sore arm, redness or swelling at the injection site, tiredness, a headache, muscle aches or a low-grade fever. These effects typically settle within a day or two and can often be managed with rest, fluids and simple pain relief if appropriate for you.
The injected flu vaccine cannot give you influenza. Occasionally, people happen to catch another respiratory virus around the time of vaccination, or they were exposed to influenza before their vaccine had time to work. This can make it seem as though the vaccine caused illness, but it does not.
No vaccine prevents every case of influenza. Its value is in reducing the likelihood of infection and, importantly, lowering the risk of severe disease and hospitalisation. For people with chronic conditions, that reduced risk can make a meaningful difference.
A practical way to plan your flu vaccination
Start by checking whether you, your child or someone you care for falls into a funded group. If you are unsure, bring details of your medical conditions, medications and previous vaccine reactions to your appointment. This lets your clinician assess flu vaccine eligibility accurately and recommend the appropriate vaccine.
Parkmore Medical Centre can help patients in Keysborough and surrounding suburbs arrange annual influenza vaccination, answer eligibility questions and coordinate care where chronic conditions or pregnancy are involved. Booking early can make it easier to choose an appointment that suits work, school and family commitments.
A flu vaccination appointment is also a useful opportunity to raise any broader preventive health questions. A short conversation with your GP can help you act early, protect the people around you and approach the flu season with greater confidence.
