Where does polio come from?

Poliovirus is a human virus that multiplies in the intestine. It can leave the body in stool and spread when sanitation, water treatment, or hand hygiene is inadequate. Close contact can transfer contaminated material to food, drinks, utensils, or a child’s mouth.

Infection may be silent, so a person can pass the virus without recognising illness. The virus is not created by cold weather, ordinary tiredness, or a vaccine. Severe disease follows nervous-system involvement rather than the simple presence of a fever.

Wash hands with soap after using the toilet or changing a nappy, and before touching food. Use safe drinking water, cook food appropriately, and clean bathroom surfaces. Keep routine polio vaccination up to date; this is especially important for children and for travel planning.

If a household member has suspected infection, ask a clinician about testing, hygiene measures, and whether local health authorities need to be contacted. Follow the advice given for the specific exposure.

Seek urgent care for sudden weakness, difficulty walking, trouble swallowing, breathing difficulty, or loss of movement. A severe headache with neck stiffness or confusion also needs immediate assessment. Gastrointestinal symptoms without neurological changes still deserve medical advice when there has been a known exposure.

Ask where the exposure may have occurred, whether household contacts need evaluation, and whether any vaccination doses should be updated.