In an outbreak, the president could declare a health emergency and take control of the vaccination effort.

But thanks to a worldwide vaccination effort, smallpox is now history.

Click on the pictures below to read about successful global vaccination efforts around the world.

She withdrew, having seen enough to recognize another wholesale vaccination effort.

Additionally, experimental vaccination efforts have been successful in animal models of schistosomiasis.

The vaccination efforts and other medical campaigns made possible by the invasion may save a million Afghan lives over the next decade.

For this reason, vaccination efforts target girls who are not yet sexually active.

Health care officials said they had experienced no change in the militants' tolerance for the vaccination efforts, and the Taliban reacted indignantly.

During the conference, the centers said that public vaccination efforts to prevent hepatitis outbreaks should be extended to prisons.

How the public will react to the government's wide-scale vaccination effort remains to be seen.