What should you know about polio virus contagious?

The virus is shed in bowel movements and can move to another person through contaminated hands, food, water, or bathroom surfaces. Close contact may also allow spread through saliva or respiratory secretions. An infected person can pass the virus without knowing it, so a quiet household does not rule out exposure.

Contagiousness is not the same as severity. Many infections are mild, while a smaller group develop inflammation affecting nerves and movement. A new weakness is therefore more concerning than a simple question about whether someone has been near an infected person.

Wash hands with soap after using the toilet or helping with toileting, and before eating or preparing food. Do not share unwashed cups or utensils with someone who may be infected. Keep bathrooms clean and follow public-health advice if an exposure is confirmed. Check that children and adults in the household are appropriately vaccinated; details are available in [Childhood Immunisation](/treatments/preventive-care-and-vaccination/childhood-immunisation/).

Contact a healthcare service promptly after possible exposure if fever is accompanied by weakness, an unsteady walk, difficulty swallowing, or reduced ability to move an arm or leg. Seek emergency help for breathing difficulty, choking, or rapidly worsening weakness. Keep the person away from food preparation while waiting for advice.

Ask when the person may safely return to school, work, or group activities, whether close contacts require vaccination review, and which symptoms should trigger an emergency call. Share the timing and type of contact as clearly as possible.