I can't tell you that we can't make the target. We won't be able to say until August, when the high-transmission season resumes. Then we'll know how many countries still have polio.

The risk now is Nigeria - and losing the commitment in other countries. But we're confident now that Nigeria will get the job done.

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.

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

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