Introduction to polio

The virus can enter through the mouth and multiply in the intestine. Many infections cause few or no noticeable symptoms, while some cause a short illness with fever, tiredness, headache, nausea, or limb and muscle discomfort. In a serious infection, the nervous system is affected. Weakness may develop in an arm or leg, and breathing muscles can be involved. Polio can affect people who are not fully protected, including adults who were never vaccinated or whose vaccination history is uncertain.

Check your vaccination record and ask a clinician whether any doses are due, especially before travel or if records are unavailable. Wash hands carefully after using the toilet and before preparing food. Do not share concerns about a possible infection only through online advice: contact a GP or public-health service for assessment and guidance. If someone has weakness, avoid strenuous activity and arrange prompt medical review.

Seek urgent medical help for new weakness in an arm or leg, difficulty walking, trouble swallowing, choking, or shortness of breath. A fever with severe headache, stiff neck, confusion, or marked drowsiness also needs urgent assessment. Tell the clinician about recent travel, contact with an unwell person, and vaccination history. These symptoms have several possible causes, but weakness or breathing problems should never be monitored at home without advice.

Ask whether your vaccination record shows adequate protection, whether a booster is appropriate for your circumstances, and which symptoms should prompt immediate help. You can also ask how to protect household members and whether travel plans change the recommended vaccination advice.