Symptoms of polio

About 95% of people with polio won't have any symptoms and will fight off the infection without even realising they were infected.

A small number of people will experience a flu -like illness 3 to 21 days after they're infected, with symptoms such as:

  • a high temperature (fever)of 38C (100.4F) or above
  • a sore throat
  • a headache
  • abdominal (tummy) pain
  • aching muscles
  • feeling and being sick

These symptoms will usually pass within about a week.

In less than 1% of cases, the polio virus attacks the nerves in the spine and base of the brain. This can cause paralysis, usually in the legs, that develops over hours or days.

The paralysis isn't usually permanent, and movement will often slowly return over the next few weeks and months. However, some people are left with persistent problems (see below) and if the breathing muscles are affected, it can be life-threatening.

Content supplied by the NHS Website

Medically Reviewed by a doctor on 21 Dec 2018