How can polio manifest?

Polio infection can pass unnoticed. When symptoms occur, they may start with fever, headache, sore throat, nausea, stomach upset, tiredness or muscle pain. These general features do not distinguish polio from other infections.

A more serious manifestation occurs when the virus affects nerve cells that control movement. Weakness can be uneven and may involve the limbs, trunk or muscles needed for swallowing and breathing. Stiffness, reduced reflexes and paralysis can follow. A clinician considers the pattern and progression rather than relying on one symptom.

Arrange prompt assessment for new weakness, an unsteady walk, unusual floppiness, trouble swallowing or a change in breathing. Note the first affected body area and whether the change is spreading. Avoid close contact while seeking advice if infection is suspected, and use careful hand hygiene.

Keeping immunisations current is a key preventive measure. Review childhood vaccine protection through [Childhood Immunisation](/treatments/preventive-care-and-vaccination/childhood-immunisation/).

Seek emergency help for breathing difficulty, choking, inability to swallow or rapidly worsening weakness. Prompt care is also needed for sudden loss of movement or severe neck and back stiffness. Do not wait for a complete diagnosis before reporting these changes.

Ask how the symptom pattern affects the assessment, whether testing is needed, how movement and breathing will be monitored, and whether household members need vaccination advice.