What should you know about polio vaccine given at what age?

A series of doses helps build and maintain protection while children are growing and may be exposed to poliovirus. The exact timing is set by the health authority and can depend on the vaccine form, previous doses, and whether vaccination is routine, catch-up, travel-related, or part of an outbreak response.

There is no single age that answers every family’s situation. A child who started late may be offered catch-up doses, while an uncertain record may need careful review. Do not repeat or skip doses based only on memory or on a schedule from another country.

Bring the child’s immunisation card to the clinic and ask the vaccinator to identify the next due dose. If an appointment was missed, arrange a review rather than restarting the series yourself. Tell the clinician about immune-system conditions, medicines that affect immunity, a previous serious vaccine reaction, or an acute illness.

If your child is travelling, ask about timing well before departure because additional advice may apply. Keep the updated record after every visit so future clinicians can see which product and dose were given.

Seek emergency care for sudden weakness, trouble breathing, difficulty swallowing, facial swelling, collapse, or widespread hives. After vaccination, fever or soreness may need advice rather than emergency treatment, but contact the clinic if symptoms are severe, worsening, or outside the instructions you received.

Ask which doses are documented, what is due next, whether catch-up is needed, whether travel changes the plan, and what reaction after vaccination should prompt urgent care.