Polio immunisation
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How India has had success in polio fight

20 February 2012 Last updated at 19:59 GMT

India once had more cases of polio than any other country but has now been polio-free for just over a year.

India was once seen as a polio epicentre, the country where the virus was most difficult to tackle.

Medical correspondent Fergus Walsh has been in Delhi to see polio immunisation first hand.