India has become the latest nation to rid itself of polio with no new cases being reported since January 2011.

170 million children were immunised over the weekend in the biggest drive of its kind in the world.

Dr Bruce Aylward, director of polio collaboration at the World Health Organisation (WHO), analyses the possibility of eradicating polio worldwide.

Get in touch with Today via email , Twitter or Facebook or text us on 84844.