The 4-year-old vaccination check: what every parent should know before school

The 4-year-old visit is the last routine childhood vaccination before primary school. It’s a single combination injection, DTPa-IPV, which boosts protection against diphtheria, tetanus, pertussis (whooping cough) and polio.

Why this visit matters

Immunity from infant doses wanes naturally over time. The pre-school booster restores protection just as your child enters environments, classrooms, sport, sleepovers, where exposure rises sharply. It’s also the standard documentation most schools and many childcare services need for enrolment.

What to expect at the appointment

Allow about 20 minutes. Your GP or council immunisation nurse checks the AIR record, confirms eligibility, and gives a single injection. The 15-minute observation period applies, bring a book. Most kids manage well, the most common after-effect is a sore arm and a slightly grumpy afternoon.

If you’re behind

Catch-up is free up to age 20 under the NIP for most childhood vaccines. Your GP will recalculate the schedule based on what your child has already had. Bring whatever records you have, the yellow childhood booklet, AIR statement, paper records from overseas.

Childcare and school enrolment

Under Victorian No Jab No Play regulations, childcare and kindergarten services need a current AIR Immunisation History Statement showing your child is up to date or on a recognised catch-up schedule. Primary schools request the same at enrolment but don’t exclude children. Read our explainer on No Jab No Play and Family Tax Benefit.

Where to be vaccinated

• Your GP.
• Local council immunisation sessions, free, usually run weekly.
• Some Aboriginal community-controlled health services.

Our pharmacist immunisers vaccinate from age 5, so the 4-year-old dose itself is usually delivered by a GP or council nurse rather than at the pharmacy. From age 5 onwards we’re happy to help with catch-ups and travel-related doses.