What should you know about polio route of transmission?

After leaving an infected person’s body, poliovirus can reach another person through unwashed hands, contaminated food, unsafe water or surfaces. It may spread from someone who has no obvious symptoms. The virus enters through the mouth and multiplies in the digestive tract before it is passed in stool. Close contact and poor sanitation can therefore support transmission, while respiratory secretions may play a smaller role in some settings.

Vaccination is the central protection because it reduces the chance that infection will cause illness and limits circulation. Wash hands carefully with soap after using the toilet and changing nappies, and before eating or preparing food. Drink treated or otherwise safe water, wash produce, cook food thoroughly, and clean frequently touched bathroom surfaces. Follow local public-health advice if an exposure or outbreak is reported.

Seek urgent care for new weakness, difficulty moving, trouble swallowing or breathing, or unusual floppiness in a child. Contact a clinician promptly for fever followed by weakness after possible exposure. Share details about travel, household illness, sanitation concerns and vaccination status so the team can assess the situation appropriately.

Ask whether your household’s polio vaccinations are current, how long extra hygiene precautions should continue after exposure, and whether anyone needs testing or monitoring. For travel, ask which water, food and vaccination precautions apply to the destination.