Two years after India was declared polio-free, the rest of the world looks set to follow its lead.
Officials hope to see the disease wiped out worldwide before the end of 2016. Their secret weapon: a new vaccine, already used in more than 150 countries, and which health workers say is safer and more effective than earlier versions.
The new vaccine is a stripped-down version of past polio vaccines. It uses less live polio virus, reducing the chance of accidental infection.
In 1988, there were 350,000 polio cases; last year just 74. The only countries with polio outbreaks in 2015 were Afghanistan and Pakistan, where new campaigns are also spurring the drive towards eradication.