This can stop transmission of the bacteria and the appearance of antibiotic-resistant strains.

However, it has overcome huge challenges to stop transmission, including its large population and hard-to-reach communities.

When we stop transmission the ionising agent is cut off, whatever it may be - perhaps Bill's electrical discharges.

We have no choice - we have to stop transmission this year.

A key generator failure would stop transmission and prevent a compromise.

However Michael Atwell, without further consultation, decided to stop transmission.

"The telefax and computers, they are death to dictators, because what can they do to stop transmission?"

The information could be the key to developing an effective vaccine, which is essential to stopping transmission.

Although how to prevent infection is known, so many factors still stand in the way of stopping transmission.

India is the latest country to successfully stop transmission of polio.