The new approach is a more rapid approach because polio is considered a public health emergency of international importance. In an interconnected world, these viruses travel easily and don't respect international borders.

We believe the outbreak has come to a peak in these areas because of information that ministries of health have given us.

What's dangerous about this is we don't know its potential. For the present, everything hinges on what we find out in China, as far as our projections [are concerned].

Polio is not only an issue in Indonesia ... but it's an international issue. That virus, just as it came here from the African continent, could now go from here to a neighboring country and become implanted in that country if protection rates for polio were low.

So that brings us to two countries that have interrupted transmission as the outbreak containment continues.

Hong Kong, with its dense population and fluid border with China, had one of the hardest outbreaks to control.