Infantile paralysis polio: what parents should know

Polio is caused by a virus that can spread through close contact and contaminated material. Many infected people have no obvious symptoms or have a mild fever, tiredness, sore throat, nausea, or stomach upset. In some cases, the infection affects the nervous system. Weakness may appear suddenly, often affecting an arm or leg, and severe disease can interfere with swallowing or breathing. Sudden weakness has several possible causes, so it requires urgent medical assessment rather than a conclusion based on symptoms alone.

Check that the child’s immunisations are recorded and discuss any missed doses with the healthcare team. Follow local advice about travel, outbreaks, and completing the childhood schedule. Encourage handwashing after toileting and before preparing food. Do not share cups or utensils with someone who is unwell. If a child develops a new weakness, keep them safe from falls and arrange emergency assessment; do not wait to see whether strength returns.

Seek emergency help for sudden weakness or inability to move an arm or leg, trouble swallowing, choking, a weak voice, severe neck or back stiffness, or difficulty breathing. A child with fever and unusual drowsiness, marked weakness, or rapidly changing symptoms also needs urgent assessment. Tell clinicians about recent travel, possible exposure, immunisation history, and the time the weakness began.

Ask whether the child is up to date with childhood immunisation, what to do after a missed dose, whether travel changes the advice, and which new neurological symptoms need emergency help.