What should you know about an outbreak of polio?

Polio is a viral infection that can spread through contact with contaminated faeces and, less commonly, respiratory secretions. Many infections cause no clear symptoms, while others cause fever, tiredness, headache, nausea, vomiting or sore throat. A small proportion of infections can affect the nervous system and cause weakness or paralysis.

An outbreak can involve cases or detection of poliovirus in the environment. It does not mean that every person exposed will become ill, but it makes vaccination and hygiene especially important.

Check that children and adults in your household have received the vaccines recommended for their age and circumstances. Contact a healthcare provider or local public-health service if records are missing, travel is planned, or an additional dose has been advised. Do not delay routine vaccination while waiting for symptoms.

Wash hands carefully after using the toilet or changing nappies and before preparing food. Use safe water and food practices, and follow isolation or testing instructions if public-health officials provide them. Vaccination protects against disease but does not replace hand hygiene.

Seek urgent medical care for sudden limb weakness, difficulty walking, trouble swallowing, breathing difficulty, or severe neck or back stiffness, especially after fever or an infectious illness. Tell the service about possible exposure and vaccination history before arrival.

Contact a clinician promptly for fever with marked weakness, worsening headache, vomiting or unusual sleepiness. A clinician can assess other causes and coordinate any required public-health advice.

Ask which doses are recorded, whether anyone needs catch-up vaccination, and what precautions apply to travel or close contact. Ask how to report symptoms and whether household members need specific advice.