Yellow fever fears in Liberia

The World Health Organisation is preparing for a mass vaccination campaign in Liberia after an outbreak of yellow fever.

It says nearly thirty cases have been detected so far, three of them fatal.

They were all in districts in the Grand Cape Mount County bordering Sierra Leone, but suspected cases are being reported elsewhere.

The vaccination campaign will target one hundred and fifty thousand people considered most at risk.

From the newsroom of the BBC World Service