Polio in infants: what parents should know

Poliovirus spreads mainly through contact with contaminated stool and can enter the body through the mouth. Many infections cause no clear symptoms, while others resemble a mild feverish illness with tiredness, sore throat, nausea or stomach upset. In a more serious illness, the virus can affect the spinal cord and brainstem. This may lead to weakness, reduced movement, unusual floppiness, or difficulty swallowing or breathing. An infant cannot describe these changes, so caregivers may notice less kicking, a weaker cry, poor feeding, or a change in alertness.

Check that your baby’s routine immunisations are recorded and speak with the child’s clinician if a dose was delayed or the record is unclear. Do not share cups, feeding items or towels with someone who may have an infectious illness, and wash hands carefully after nappy changes. If your baby has new weakness, poor feeding or unusual sleepiness, arrange medical advice promptly and describe when the change began. Vaccination information is available in [Childhood Immunisation](/treatments/preventive-care-and-vaccination/childhood-immunisation/).

Seek urgent medical help if an infant has sudden weakness, cannot move an arm or leg normally, becomes very floppy, struggles to swallow, has noisy or difficult breathing, or is difficult to wake. These signs need assessment because illnesses affecting nerves or breathing can worsen quickly. A fever alone does not identify polio, but fever together with reduced movement or feeding deserves prompt advice.

Ask which immunisations are due, whether a catch-up plan is needed, and which changes in movement or feeding should prompt immediate review. You can also ask how to reduce infection spread at home and whether anyone in close contact with the baby needs medical advice.