Polio is in its final days.
The disease that once paralyzed hundreds of thousands of kids a year around the globe is now down to just a few dozen cases this year. "We are aiming to halt all transmission of wild polio virus next year," says Peter Crowley, the head of UNICEF's global efforts against polio.
If polio is stopped, it will be only the second human disease to be eliminated. Smallpox was the first — the last case was in 1977.