"That makes sense, but how were they able to come up with a vaccine for it?"

I know there are a lot of groups who take issue with specific vaccines.

"Half the struggle with a vaccine is getting the patients to take it."

"I'll come up with a vaccine to prevent the disease."

Researchers hope to build on that success - with other vaccines.

These problems are similar to ones commonly experienced with other vaccines.

The future - the very lives - of these children depend on our ability to reach them with vaccines and health education.

With an oral vaccine, there is no risk of blood contamination.

And unless someone comes up with a vaccine, that is unlikely to change before millions more die.

With later improvements and a vaccine, the death rate is now negligible.