A health worker gives polio vaccine to a child during a door-to-door campaign in Kandahar, Afghanistan, on May 23. EPA
A health worker gives polio vaccine to a child during a door-to-door campaign in Kandahar, Afghanistan, on May 23. EPA
What is polio and how long do vaccinations last?
Now polio has been detected in the UK, we run through everything you need to know about the deadly disease
