Nigerian President Goodluck Jonathan declares the outbreak of Ebola "a national emergency" and approves funds to help contain the deadly virus.

A health warning is being issued by councils across England and Wales about the dangers of inhaling nitrous oxide, also known as "laughing gas".

Learning to sing or play a musical instrument can help disadvantaged children improve their reading skills, US research suggests.

A pilot study suggests an experimental treatment that involves infusing stem cells into the brain may boost recovery after stroke.

Guinea shuts its borders with Liberia and Sierra Leone to contain the spread of the Ebola virus, which has killed hundreds in West Africa.