What should you know about initial symptoms of polio?

Poliovirus infection may cause no symptoms or a short, flu-like illness. Early features can include fever, tiredness, headache, sore throat, nausea, vomiting, or abdominal discomfort. A smaller group develops neurological symptoms, such as severe muscle pain, neck or back stiffness, unusual sensitivity, or weakness in an arm or leg. Weakness may worsen, and breathing or swallowing muscles can be affected. These signs are not unique to polio, but sudden weakness is medically urgent. Vaccination status, travel, contact history, and the local infection situation help clinicians assess concern.

Contact a healthcare service promptly if a person develops a compatible illness after travel or contact with a suspected case, especially when immunisation is incomplete or uncertain. Share the symptom timeline, vaccination record, travel details, and any weakness or difficulty swallowing. Avoid close contact while seeking advice and follow public-health instructions about hygiene and testing. Keep routine protection up to date through [Childhood Immunisation](/treatments/preventive-care-and-vaccination/childhood-immunisation/). Do not rely on symptom appearance to decide that polio is present or absent.

Seek emergency care for new weakness, inability to move a limb normally, trouble breathing, difficulty swallowing, choking, severe neck stiffness, or rapidly worsening symptoms. A child who becomes unusually floppy or cannot walk as expected needs immediate assessment. Keep the person safe during transport and do not delay because fever has improved.

Is the vaccination record complete for the person’s age and travel plans? Does this illness need urgent neurological assessment or public-health notification? What contact precautions and follow-up should we use while the cause is being checked?